diff --git a/src/adonisjs/public/author/js/author.js b/src/adonisjs/public/author/js/author.js
index 46555a672..0738865e7 100644
--- a/src/adonisjs/public/author/js/author.js
+++ b/src/adonisjs/public/author/js/author.js
@@ -289,7 +289,7 @@ class AuthorManager {
   async _caseLoad (caseId) {
     Basic.service.currentCaseId = caseId
 
-    const caseObj = await MessageBus.i.request('data/case/' + caseId + '/get', null, null, true)
+    const caseObj = await MessageBus.i.request('case/get/' + caseId, null, null, true)
 
     this._currentCaseTitle = caseObj.message.title
     await this._compile(caseObj.message.source)
@@ -542,7 +542,7 @@ class AuthorManager {
       Comments.prepare(this._compiledCase, knotid)
       if (Panels.s.commentsVisible)
         MessageBus.i.publish('control/comments/editor')
-      MessageBus.i.publish('control/case/ready', null, true)
+      MessageBus.i.publish('case/ready/' + Basic.service.currentCaseId, null, true)
     }
   }
 
diff --git a/src/adonisjs/public/author/js/draft.js b/src/adonisjs/public/author/js/draft.js
index 720dbf061..7f1eb43b1 100644
--- a/src/adonisjs/public/author/js/draft.js
+++ b/src/adonisjs/public/author/js/draft.js
@@ -231,7 +231,7 @@ class DraftManager {
   }
 
   async downloadCase (topic, message) {
-    const caseObj = await MessageBus.i.request('data/case/' + message + '/get', null, null, true)
+    const caseObj = await MessageBus.i.request('case/get/' + message, null, null, true)
     Basic.service.downloadFile(
       caseObj.message.source, caseObj.message.title + '.md')
   }
diff --git a/src/adonisjs/public/context/playground/js/versum-context.js b/src/adonisjs/public/context/playground/js/versum-context.js
index b15356469..110052fb4 100644
--- a/src/adonisjs/public/context/playground/js/versum-context.js
+++ b/src/adonisjs/public/context/playground/js/versum-context.js
@@ -16,7 +16,7 @@ class VersumContextManager {
     this.updateVisibility = this.updateVisibility.bind(this)
 
     MessageBus.i.subscribe('control/translate/example', this.translate)
-    MessageBus.i.subscribe('var/output/changed', this.updateVisibility)
+    MessageBus.i.subscribe('input/changed/output', this.updateVisibility)
   }
 
   async translate (topic, message) {
diff --git a/src/adonisjs/public/dccs/components/control/dcc-compute.js b/src/adonisjs/public/dccs/components/control/dcc-compute.js
index 78bcdeee6..62a15f803 100644
--- a/src/adonisjs/public/dccs/components/control/dcc-compute.js
+++ b/src/adonisjs/public/dccs/components/control/dcc-compute.js
@@ -19,7 +19,7 @@ class DCCCompute extends DCCBase {
         if (this.active) {
           const variables = DCCCompute.filterVariables(this._compiled, false)
           for (let v of variables)
-            this._subscribe('var/' + v + '/set', this.update)
+            this._subscribe('var/set/' + v.replace(/\./g, '/'), this.update)
         }
       }
     }
@@ -70,7 +70,7 @@ class DCCCompute extends DCCBase {
       this.update()
   }
 
-  async update() {
+  async update () {
     const result = await DCCCompute.computeExpression(this._compiled, this._bus)
     if (result)
       await this.multiRequest('true', null)
@@ -101,9 +101,9 @@ class DCCCompute extends DCCBase {
       case 'divert-script':
         let message
         if (expression.target.startsWith('Case.'))
-          { message = 'case/' + expression.target.substring(5) + '/navigate' }
+          { message = 'case/navigate/' + expression.target.substring(5) }
         else
-          { message = 'knot/' + expression.target + '/navigate' }
+          { message = 'knot/navigate/' + expression.target.replace(/\./g, '/') }
         let cBus = (bus != null) ? bus : MessageBus.i
         if (expression.parameter) {
           bus.publish(message, expression.parameter, true)
@@ -227,7 +227,8 @@ class DCCCompute extends DCCBase {
       if (s[0] != null) {
         result = DCCCompute.computeCompiled(s[1])
         let cBus = (bus != null) ? bus : MessageBus.i
-        await cBus.request('var/' + s[0] + '/set', result, null, true)
+        await cBus.request('var/set/' + s[0].replace(/\./g, '/'),
+                           result, null, true)
       } else if (compiledSet.length == 1) {
         result = DCCCompute.computeCompiled(s[1])
         // looks for a variable inside the expression
@@ -235,7 +236,7 @@ class DCCCompute extends DCCBase {
         if (autoAssign) {
           let variable = s[1].find(el => el[0] == 3)
           if (variable)
-            await this._request('var/' + variable[1] + '/set', result, null, true)
+            await this._request('var/set/' + variable[1].replace(/\./g, '/'), result, null, true)
         }
         */
       }
@@ -269,8 +270,9 @@ class DCCCompute extends DCCBase {
     for (let c of compiled)
       if (c[0] == DCCCompute.role.variable) {
         let cBus = (bus != null) ? bus : MessageBus.i
-        if (cBus.hasSubscriber('var/' + c[1] + '/get')) {
-          const mess = await cBus.request('var/' + c[1] + '/get', null, null, true)
+        if (cBus.hasSubscriber('var/get/' + c[1].replace(/\./g, '/'), true)) {
+          const mess = await cBus.request('var/get/' + c[1].replace(/\./g, '/'),
+                                          null, null, true)
           if (mess.message != null) {
             const value = (mess.message.body != null)
               ? mess.message.body : mess.message
diff --git a/src/adonisjs/public/dccs/components/data/dcc-submit.js b/src/adonisjs/public/dccs/components/data/dcc-submit.js
index 108c6fb69..bc3d8e2e9 100644
--- a/src/adonisjs/public/dccs/components/data/dcc-submit.js
+++ b/src/adonisjs/public/dccs/components/data/dcc-submit.js
@@ -41,7 +41,7 @@ class DCCSubmit extends DCCButton {
       const topic = (this.hasAttribute('topic'))
         ? this.topic
         : (this.hasAttribute('variable'))
-          ? 'var/' + this.variable + '/changed'
+          ? 'input/changed/' + this.variable.replace(/\./g, '/')
           : 'button/' + this.label + '/clicked'
       if (this.hasAttribute('message')) { message.value = this.message }
       let form = null
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-button.js b/src/adonisjs/public/dccs/components/visual/dcc-button.js
index 053be7b1f..0bcbe4c17 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-button.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-button.js
@@ -16,9 +16,11 @@ class DCCButton extends DCCBlock {
   connectedCallback () {
     super.connectedCallback()
 
-    if (this.hasAttribute('topic') && this.topic.endsWith('/navigate')) {
+    if (this.hasAttribute('topic') &&
+        MessageBus.extractLevel(this.topic, 2) == 'navigate') {
       this.navigationBlocked = this.navigationBlocked.bind(this)
-      this._subscribe('+/+/navigate/blocked', this.navigationBlocked)
+      this._subscribe(MessageBus.extractLevelsSegment(this.topic, 1, 2) + '/!',
+                      this.navigationBlocked)
     }
 
     this._publish('control/button/' +
@@ -153,10 +155,12 @@ class DCCButton extends DCCBlock {
         const v = (this.variable.includes(':'))
           ? this.variable.substring(0, this.variable.indexOf(':')) : this.variable
         message.value = (this.variable.endsWith(':label')) ? this.label : this.message
-        this._publish('var/' + v + '/changed', message, true)
+        this._publish('input/changed/' + v.replace(/\./g, '/'), message, true)
       }
       if (this.hasAttribute('label') || this.hasAttribute('topic')) {
-        if (this.hasAttribute('topic') && this.topic.endsWith('/navigate')) { this._active = false }
+        if (this.hasAttribute('topic') &&
+            MessageBus.extractLevel(this.topic, 2) == 'navigate')
+          this._active = false
         const topic = (this.hasAttribute('topic'))
           ? this.topic : 'button/' + this.label + '/clicked'
         if (this.hasAttribute('message')) { message.value = this.message }
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-expression.js b/src/adonisjs/public/dccs/components/visual/dcc-expression.js
index a201e98c8..a55e3ab05 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-expression.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-expression.js
@@ -34,7 +34,7 @@ class DCCExpression extends DCCVisual {
     //                    also monitors all messages
     if (this.active) {
       this.stateChanged = this.stateChanged.bind(this)
-      this._subscribe('var/+/state_changed', this.stateChanged)
+      this._subscribe('input/state/#', this.stateChanged)
       this._stateValues = {}
     }
 
@@ -47,10 +47,10 @@ class DCCExpression extends DCCVisual {
         if (this.active) {
           this.variableUpdated = this.variableUpdated.bind(this)
           const variables = DCCCompute.filterVariables(this._compiled, false)
-          // this._subscribe(//   'var/' + this._variable + '/set', this.variableUpdated)
-          this._subscribe('var/*/set', this.variableUpdated)
+          this._subscribe('var/set/*', this.variableUpdated)
           for (let v of variables)
-            this._subscribe('var/' + v + '/set', this.variableUpdated)
+            this._subscribe('var/set/' + v.replace(/\./g, '/'),
+                            this.variableUpdated)
         }
       }
     }
@@ -66,7 +66,6 @@ class DCCExpression extends DCCVisual {
 
   async _showResult () {
     let result = await DCCCompute.computeExpression(this._compiled)
-    // let result = await this._request('var/' + this._variable + '/get', null, null, true)
     if (result == null) {
       result = ''
     } else {
@@ -139,7 +138,7 @@ class DCCExpression extends DCCVisual {
   }
 
   stateChanged (topic, message) {
-    const id = MessageBus.extractLevel(topic, 2)
+    const id = MessageBus.extractLevelsSegment(topic, 3).replace(/\//g, '.')
 
     if (id.startsWith(this._variable)) {
       const subid = id.substring(this._variable.length + 1)
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-image-marker.js b/src/adonisjs/public/dccs/components/visual/dcc-image-marker.js
index 275d5b6e0..f9dd7a245 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-image-marker.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-image-marker.js
@@ -123,7 +123,7 @@ class DCCGroupMarker extends DCCBase {
     this._subscribe('dcc/marker-spot/set', this.setMarkerSpot)
     this._subscribe('dcc/marker-spot/selected', this.spotSelected)
 
-    this._publish('var/' + this.context + '/group_input/ready',
+    this._publish('input/ready/</' + this.context.replace(/\./g, '/'),
       DCCGroupMarker.elementTag)
 
     if (this.hasAttribute('editor')) {
@@ -349,7 +349,7 @@ class DCCGroupMarker extends DCCBase {
             width="1000"
             height="1000"
             preserveAspectRatio="xMinYMin meet"
-            xlink:href="[image]"/>      
+            xlink:href="[image]"/>
       </g>
    </g>
   </svg>`
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-input-choice.js b/src/adonisjs/public/dccs/components/visual/dcc-input-choice.js
index f38a7b96b..fb98ec306 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-input-choice.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-input-choice.js
@@ -27,7 +27,7 @@ class DCCInputOption extends DCCInput {
 
     // <TODO> align with dcc-state-select
     if (this._parent == null) {
-      this._publish('var/' + this._variable + '/input/ready',
+      this._publish('input/ready/' + this._variable.replace(/\./g, '/'),
         {
           sourceType: DCCInputOption.elementTag,
           content: this.value
@@ -100,7 +100,7 @@ class DCCInputOption extends DCCInput {
 
   inputChanged () {
     this.changed = true
-    this._publish('var/' + this._variable + '/changed',
+    this._publish('input/changed/' + this._variable.replace(/\./g, '/'),
       {
         sourceType: DCCInputOption.elementTag,
         value: this.value
@@ -233,7 +233,7 @@ class DCCInputChoice extends DCCInput {
     }
 
     this.changed = true
-    this._publish('var/' + this._variable + '/changed',
+    this._publish('input/changed/' + this._variable.replace(/\./g, '/'),
       {
         sourceType: DCCInputChoice.elementTag,
         value: this._value
@@ -400,7 +400,7 @@ class DCCInputChoice extends DCCInput {
     this._presentationIsReady()
 
     // <TODO> align with dcc-state-select
-    this._publish('var/' + this._variable + '/group_input/ready',
+    this._publish('input/ready/</' + this._variable.replace(/\./g, '/'),
       DCCInputChoice.elementTag)
   }
 
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-input-table.js b/src/adonisjs/public/dccs/components/visual/dcc-input-table.js
index f8cebc598..3def3f69f 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-input-table.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-input-table.js
@@ -21,8 +21,8 @@ class DCCInputTable extends DCCInput {
     super.connectedCallback()
     this.innerHTML = ''
 
-    this._publish('var/' + this._variable + '/input/ready',
-      DCCInputTable.elementTag)
+    this._publish('input/ready/' + this._variable.replace(/\./g, '/'),
+                  DCCInputTable.elementTag)
   }
 
   disconnectedCallback () {
@@ -87,7 +87,7 @@ class DCCInputTable extends DCCInput {
     const row = parseInt(id.substring(p + 1)) - 1
     this._value[row][col] = event.target.value
 
-    this._publish('var/' + this._variable + '/changed',
+    this._publish('input/changed/' + this._variable.replace(/\./g, '/'),
       {
         sourceType: DCCInputTable.elementTag,
         value: this._value
@@ -129,7 +129,8 @@ class DCCInputTable extends DCCInput {
 
     if (this.hasAttribute('player')) {
       const value = await this._request(
-        'var/' + this.player + '/get/sub', this.innerHTML, null, true)
+        'var/get/>/' + this.player.replace(/\./g, '/'),
+        this.innerHTML, null, true)
       console.log('=== return value')
       console.log(value)
       const input = value.message
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-input-typed.js b/src/adonisjs/public/dccs/components/visual/dcc-input-typed.js
index 5127cf70e..d8a4965c7 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-input-typed.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-input-typed.js
@@ -13,7 +13,7 @@ class DCCInputTyped extends DCCInput {
     super.connectedCallback()
     this.innerHTML = ''
 
-    this._publish('var/' + this._variable + '/input/ready',
+    this._publish('input/ready/' + this._variable.replace(/\./g, '/'),
       DCCInputTyped.elementTag)
   }
 
@@ -55,7 +55,7 @@ class DCCInputTyped extends DCCInput {
   inputTyped () {
     this.changed = true
     this.value = this._inputVariable.value
-    this._publish('var/' + this._variable + '/typed',
+    this._publish('input/typed/' + this._variable.replace(/\./g, '/'),
       {
         sourceType: DCCInputTyped.elementTag,
         value: this.value
@@ -65,7 +65,7 @@ class DCCInputTyped extends DCCInput {
   inputChanged () {
     this.changed = true
     this.value = this._inputVariable.value
-    this._publish('var/' + this._variable + '/changed',
+    this._publish('input/changed/' + this._variable.replace(/\./g, '/'),
       {
         sourceType: DCCInputTyped.elementTag,
         value: this.value
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-input.js b/src/adonisjs/public/dccs/components/visual/dcc-input.js
index daf52220d..d3e9e8c12 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-input.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-input.js
@@ -23,8 +23,8 @@ class DCCInput extends DCCBlock {
         ? this._statement
         : this._variable.substring(this._variable.lastIndexOf('.') + 1)
 
-      this._publish('var/' + this._variable + '/input/mandatory',
-        inputIndication)
+      this._publish('input/mandatory/' + this._variable.replace(/\./g, '/'),
+                    inputIndication)
     }
   }
 
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-slider.js b/src/adonisjs/public/dccs/components/visual/dcc-slider.js
index 01babda61..dcf4e56c7 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-slider.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-slider.js
@@ -24,7 +24,7 @@ class DCCSlider extends DCCInput {
     super.connectedCallback()
     this.innerHTML = ''
 
-    this._publish('var/' + this._variable + '/input/ready',
+    this._publish('input/ready/' + this._variable.replace(/\./g, '/'),
       DCCSlider.elementTag)
   }
 
@@ -69,7 +69,7 @@ class DCCSlider extends DCCInput {
     this.changed = true
     this._value = this._inputVariable.value
     if (this._inputIndex) { this._inputIndex.innerHTML = this._value }
-    this._publish('var/' + this._variable + '/changed',
+    this._publish('input/changed/' + this._variable.replace(/\./g, '/'),
       {
         sourceType: DCCSlider.elementTag,
         value: this._value
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-state-select.js b/src/adonisjs/public/dccs/components/visual/dcc-state-select.js
index d986a2b32..d885ec117 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-state-select.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-state-select.js
@@ -57,7 +57,7 @@ class DCCStateSelect extends DCCVisual {
 
     this._render()
 
-    this._publish('var/' + this.completeId + '/subinput/ready',
+    this._publish('input/ready/>/' + this.completeId.replace(/\./g, '/'),
       {
         sourceType: DCCStateSelect.elementTag,
         content: this.innerHTML
@@ -134,7 +134,8 @@ class DCCStateSelect extends DCCVisual {
   }
 
   set selection (newValue) {
-    if (this._statesArr && this._statesArr.includes(newValue)) { this._selectionIndex = this._statesArr.indexOf(newValue) }
+    if (this._statesArr && this._statesArr.includes(newValue))
+      this._selectionIndex = this._statesArr.indexOf(newValue)
     this.setAttribute('selection', newValue)
   }
 
@@ -143,16 +144,22 @@ class DCCStateSelect extends DCCVisual {
   }
 
   set selectionIndex (newValue) {
-    if (this._statesArr && this._statesArr[newValue]) { this.selection = this._statesArr[newValue] } else { this._selectionIndex = newValue }
+    if (this._statesArr && this._statesArr[newValue])
+      this.selection = this._statesArr[newValue]
+    else
+      this._selectionIndex = newValue
   }
 
   /* Rendering */
 
   async _render () {
     if (this.states != null) {
-      if (this.hasAttribute('answer') || this.author) { this.selection = this.answer } else if (this.hasAttribute('player')) {
+      if (this.hasAttribute('answer') || this.author)
+        this.selection = this.answer
+      else if (this.hasAttribute('player')) {
         const value = await this._request(
-          'var/' + this.player + '/get/sub', this.innerHTML, null, true)
+          'var/get/>/' + this.player.replace(/\./g, '/'),
+          this.innerHTML, null, true)
         this.selection = value.message
       } else {
         this._presentation.addEventListener('mouseover', this._showState)
@@ -196,7 +203,7 @@ class DCCStateSelect extends DCCVisual {
   _changeState () {
     if (this.states != null) {
       this.selectionIndex = (this.selectionIndex + 1) % this._statesArr.length
-      this._publish('var/' + this.completeId + '/state_changed',
+      this._publish('input/state/' + this.completeId.replace(/\./g, '/'),
         {
           sourceType: DCCStateSelect.elementTag,
           state: this.selection,
@@ -240,8 +247,8 @@ class DCCGroupSelect extends DCCBlock {
     this._groupReady = true
     this._answerRequests()
 
-    this._publish('var/' + this.variable + '/group_input/ready',
-      DCCGroupSelect.elementTag)
+    this._publish('input/ready/</' + this.variable.replace(/\./g, '/'),
+                  DCCGroupSelect.elementTag)
   }
 
   disconnectedCallback () {
diff --git a/src/adonisjs/public/dccs/components/visual/dcc-state.js b/src/adonisjs/public/dccs/components/visual/dcc-state.js
index 155c9fbcc..01aa06c05 100644
--- a/src/adonisjs/public/dccs/components/visual/dcc-state.js
+++ b/src/adonisjs/public/dccs/components/visual/dcc-state.js
@@ -146,15 +146,6 @@ class DCCState extends DCCBlock {
         : ((n < allStates.length) ? n
           : ((this.rotate) ? 0 : s))
       this.changeState(allStates[n])
-      /*
-         this._stateDCCs[this.value].hide();
-         this.value = allStates[n];
-         this._stateDCCs[this.value].show();
-         if (this.hasAttribute("variable"))
-            this._publish("var/" + this.variable + "/changed",
-                                 {sourceType: DCCState.elementTag,
-                                  value: this.value}, true);
-         */
     }
   }
 
@@ -164,7 +155,7 @@ class DCCState extends DCCBlock {
       this.value = newState
       this._stateDCCs[this.value].show()
       if (this.hasAttribute('variable')) {
-        this._publish('var/' + this.variable + '/changed',
+        this._publish('input/changed/' + this.variable.replace(/\./g, '/'),
           {
             sourceType: DCCState.elementTag,
             value: this.value
diff --git a/src/adonisjs/public/dccs/components/web/dcc-dhtml.js b/src/adonisjs/public/dccs/components/web/dcc-dhtml.js
index 7df72ab07..4c0211b50 100644
--- a/src/adonisjs/public/dccs/components/web/dcc-dhtml.js
+++ b/src/adonisjs/public/dccs/components/web/dcc-dhtml.js
@@ -36,11 +36,11 @@ class DCCDHTML extends DCCBase {
                            {attributes: true, childList: true, subtree: true})
 
     if (this.hasAttribute('autoupdate')) {
-      let record = await this._request('var/*/get', null, null, true)
+      let record = await this._request('var/get/*', null, null, true)
       record = (record == null || record.message == null) ? {} : record.message
-      this.recordUpdate('var/*/get', record)
+      this.recordUpdate('var/get/*', record)
       this.fieldUpdate = this.fieldUpdate.bind(this)
-      this._subscribe('var/+/set', this.fieldUpdate)
+      this._subscribe('var/set/#', this.fieldUpdate)
     }
 
     this._ready = false
@@ -168,7 +168,7 @@ class DCCDHTML extends DCCBase {
   }
 
   fieldUpdate (topic, message) {
-    const id = MessageBus.extractLevel(topic, 2)
+    const id = MessageBus.extractLevelsSegment(topic, 3).replace(/\//g, '.')
     const value = this._extractValue(message)
     if (id == '*')
       this._record = value
diff --git a/src/adonisjs/public/dccs/edit/inplace-text-editor.js b/src/adonisjs/public/dccs/edit/inplace-text-editor.js
index 602bb2102..4cd22e5ef 100644
--- a/src/adonisjs/public/dccs/edit/inplace-text-editor.js
+++ b/src/adonisjs/public/dccs/edit/inplace-text-editor.js
@@ -61,7 +61,7 @@ class EditDCCText extends EditDCC {
              },
              {
                name: 'harenaProvider',
-               url: /(^https?:\/\/(?:localhost|0\.0\.0\.0|(?:dev\.)?jacinto\.harena\.org)(?::10020)?\/.*)/,
+               url: /(^https?:\/\/(?:localhost|0\.0\.0\.0|(?:dev\.)?jacinto(?:-.)?\.harena\.org)(?::10020)?\/.*)/,
                html: match => '<video controls><source src="' + match[1] + '"></video>'
              }
            ]
diff --git a/src/adonisjs/public/dccs/playground/gallery/cell/ecology-editor.js b/src/adonisjs/public/dccs/playground/gallery/cell/ecology-editor.js
index ec0479746..639b350be 100644
--- a/src/adonisjs/public/dccs/playground/gallery/cell/ecology-editor.js
+++ b/src/adonisjs/public/dccs/playground/gallery/cell/ecology-editor.js
@@ -178,16 +178,16 @@ Selecione abaixo a chance de cada um dos eventos:
 </dcc-timer>
 
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
-<subscribe-dcc target="plant-replicates" topic="var/plant_replicates/changed" map="probability">
+<subscribe-dcc target="plant-replicates" topic="input/changed/plant_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="plant-dies" topic="var/plant_dies/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="herbivore-replicates" topic="var/herbivore_replicates/changed" map="probability">
+<subscribe-dcc target="plant-dies" topic="input/changed/plant_dies" map="probability"></subscribe-dcc>
+<subscribe-dcc target="herbivore-replicates" topic="input/changed/herbivore_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="herbivore-dies" topic="var/herbivore_dies/changed" map="probability">
+<subscribe-dcc target="herbivore-dies" topic="input/changed/herbivore_dies" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="carnivore-replicates" topic="var/carnivore_replicates/changed" map="probability">
+<subscribe-dcc target="carnivore-replicates" topic="input/changed/carnivore_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="carnivore-dies" topic="var/carnivore_dies/changed" map="probability">
+<subscribe-dcc target="carnivore-dies" topic="input/changed/carnivore_dies" map="probability">
 </subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="type/#"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
diff --git a/src/adonisjs/public/dccs/playground/gallery/cell/microworld3.js b/src/adonisjs/public/dccs/playground/gallery/cell/microworld3.js
index 81d1e76ce..dee047892 100644
--- a/src/adonisjs/public/dccs/playground/gallery/cell/microworld3.js
+++ b/src/adonisjs/public/dccs/playground/gallery/cell/microworld3.js
@@ -164,16 +164,16 @@ Selecione abaixo a chance de cada um dos eventos:
 </dcc-timer>
 
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
-<subscribe-dcc target="alga-replicates" topic="var/alga_replicates/changed" map="probability">
+<subscribe-dcc target="alga-replicates" topic="input/changed/alga_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="alga-dies" topic="var/alga_dies/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="nematode-replicates" topic="var/nematode_replicates/changed" map="probability">
+<subscribe-dcc target="alga-dies" topic="input/changed/alga_dies" map="probability"></subscribe-dcc>
+<subscribe-dcc target="nematode-replicates" topic="input/changed/nematode_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="nematode-dies" topic="var/nematode_dies/changed" map="probability">
+<subscribe-dcc target="nematode-dies" topic="input/changed/nematode_dies" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-replicates" topic="var/tardigrade_replicates/changed" map="probability">
+<subscribe-dcc target="tardigrade-replicates" topic="input/changed/tardigrade_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-dies" topic="var/tardigrade_dies/changed" map="probability">
+<subscribe-dcc target="tardigrade-dies" topic="input/changed/tardigrade_dies" map="probability">
 </subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="type/#"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
diff --git a/src/adonisjs/public/dccs/playground/gallery/cell/movement-sand-clock-editor.js b/src/adonisjs/public/dccs/playground/gallery/cell/movement-sand-clock-editor.js
index 2c006384f..fb0a09120 100644
--- a/src/adonisjs/public/dccs/playground/gallery/cell/movement-sand-clock-editor.js
+++ b/src/adonisjs/public/dccs/playground/gallery/cell/movement-sand-clock-editor.js
@@ -141,9 +141,9 @@ Selecione abaixo a chance de cada um dos eventos:
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/load" map="load"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/download" map="download"></subscribe-dcc>
-<subscribe-dcc target="fall-vertical" topic="var/fall_vertical/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="fall-oblique" topic="var/fall_oblique/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="roll" topic="var/roll/changed" map="probability"></subscribe-dcc>
+<subscribe-dcc target="fall-vertical" topic="input/changed/fall_vertical" map="probability"></subscribe-dcc>
+<subscribe-dcc target="fall-oblique" topic="input/changed/fall_oblique" map="probability"></subscribe-dcc>
+<subscribe-dcc target="roll" topic="input/changed/roll" map="probability"></subscribe-dcc>
 
 </div>
 </div>`
diff --git a/src/adonisjs/public/infra/bus.js b/src/adonisjs/public/infra/bus.js
index 419ae1563..35fc43ffe 100644
--- a/src/adonisjs/public/infra/bus.js
+++ b/src/adonisjs/public/infra/bus.js
@@ -57,6 +57,16 @@ class MessageBus {
   }
 
   async publish (topic, message, track) {
+    /*
+    console.log('----- message: ' + topic)
+    console.log(message)
+    if (this._runningCase && this._runningCase.track)
+      console.log(this._runningCase.track.userid)
+    else {
+      console.log('[no running case]')
+    }
+    */
+
     if (track != null && this.debugger != null)
       this.debugger(topic, message)
 
@@ -136,7 +146,7 @@ class MessageBus {
     if (responseTopic) { rt = responseTopic } else {
       if (rm == null) { rm = {} } else if (typeof rm !== 'object') { rm = { body: rm } }
       rm.responseStamp = MessageBus._stamp
-      rt = requestTopic + '/response/' + MessageBus._stamp
+      rt = 'response/' + MessageBus._stamp + '/' + requestTopic
       MessageBus._stamp++
     }
 
@@ -157,6 +167,16 @@ class MessageBus {
     }
   }
 
+  /*
+   Publishes the response only if a request exists
+   */
+  publishHasResponse (topic, requestMessage, responseMessage, track) {
+    if (requestMessage.responseStamp)
+      this.publish(
+        MessageBus.buildResponseTopic(topic, requestMessage),
+        responseMessage, track)
+  }
+
   async waitMessage (topic) {
     const promise = new Promise((resolve, reject) => {
       const callback = function (topic, message) {
@@ -256,18 +276,44 @@ class MessageBus {
    * Returns the label at a specific level of the message.
    */
   static extractLevel (topic, level) {
-    let label = null
+    const levelSet = MessageBus._splitLevels(topic, level)
+    return (levelSet == null) ? null : levelSet[level - 1]
+  }
+
+  /*
+   * Returns the hierarchy from a level to a level of the message.
+   */
+  static extractLevelsSegment (topic, levelFrom, levelTo) {
+    let hierarchy = null
+    const levelSet = MessageBus._splitLevels(topic)
+    if (levelSet != null) {
+      if (levelTo == null)
+        levelTo = levelSet.length
+      if (levelTo >= levelFrom) {
+        if (levelSet != null) {
+          hierarchy = ''
+          for (let l = levelFrom-1; l < levelTo; l++)
+            hierarchy += levelSet[l] + ((l < levelTo-1) ? '/' : '')
+        }
+      }
+    }
+    return hierarchy
+  }
+
+  static _splitLevels (topic, level) {
+    let split = null
     if (topic != null) {
       const levelSet = topic.split('/')
-      if (level <= levelSet.length) { label = levelSet[level - 1] }
+      if (level == null || level <= levelSet.length)
+        split = levelSet
     }
-    return label
+    return split
   }
 
   /* Message building services
       *************************/
   static buildResponseTopic (topic, message) {
-    return topic + '/response/' + message.responseStamp
+    return 'response/' + message.responseStamp + '/' + topic
   }
 }
 
diff --git a/src/adonisjs/public/infra/conditional-layout.js b/src/adonisjs/public/infra/conditional-layout.js
index 2bf93a35c..6b1d16adf 100644
--- a/src/adonisjs/public/infra/conditional-layout.js
+++ b/src/adonisjs/public/infra/conditional-layout.js
@@ -56,7 +56,7 @@ class LayoutController {
 
   async busMessages(){
     // console.log('======= starting conditional-layout')
-    LayoutController.user = await MessageBus.i.waitMessage('data/user/info')
+    LayoutController.user = await MessageBus.i.waitMessage('user/login/+')
     if(new URL(document.location).pathname == '/author/'){
       LayoutController.case = await MessageBus.i.waitMessage('service/response/get/harena-case')
     }
diff --git a/src/adonisjs/public/infra/dcc-common-server-proxy.js b/src/adonisjs/public/infra/dcc-common-server-proxy.js
index c0f961bae..fc9cb766f 100644
--- a/src/adonisjs/public/infra/dcc-common-server-proxy.js
+++ b/src/adonisjs/public/infra/dcc-common-server-proxy.js
@@ -7,7 +7,7 @@ class DCCCommonServer {
     this.casesList = this.casesList.bind(this)
     MessageBus.i.subscribe('data/case/*/list', this.casesList)
     this.loadCase = this.loadCase.bind(this)
-    MessageBus.i.subscribe('data/case/+/get', this.loadCase)
+    MessageBus.i.subscribe('case/get/+', this.loadCase)
     this.loadTheme = this.loadTheme.bind(this)
     this.themeFamilySettings = this.themeFamilySettings.bind(this)
     MessageBus.i.subscribe('data/theme_family/+/settings',
diff --git a/src/adonisjs/public/infra/dcc-logger.js b/src/adonisjs/public/infra/dcc-logger.js
index d8b22321f..0aa643490 100644
--- a/src/adonisjs/public/infra/dcc-logger.js
+++ b/src/adonisjs/public/infra/dcc-logger.js
@@ -6,13 +6,25 @@ class DCCLogger extends DCCLight {
     super()
 
     this._notifyLogger = this._notifyLogger.bind(this)
-    this._subscribe('case/summary', this._notifyLogger)
+    this._subscribe('#', this._notifyLogger)
   }
 
   _notifyLogger (topic, message, track) {
     if (track) {
-      console.log('=== logger DCC: ' + topic)
-      console.log(message)
+      // console.log('=== logger DCC: ' + topic)
+      // console.log(message)
+
+      if (MessageBus.matchFilter(topic, 'user/login/+')) {
+        console.log('=== user logged')
+        console.log(MessageBus.extractLevel(topic, 3))
+      }
+
+      if (MessageBus.matchFilter(topic, 'case/start/+')) {
+        console.log('=== case started')
+        console.log('user id: ' + message.userId)
+        console.log('case id: ' + message.caseId)
+        console.log('instance id: ' + MessageBus.extractLevel(topic, 3))
+      }
     }
   }
 }
diff --git a/src/adonisjs/public/infra/simple-page-tasks.js b/src/adonisjs/public/infra/simple-page-tasks.js
index 661f10200..e360c75fb 100644
--- a/src/adonisjs/public/infra/simple-page-tasks.js
+++ b/src/adonisjs/public/infra/simple-page-tasks.js
@@ -18,7 +18,7 @@ class PageController {
       // console.log(PageController.scriptsComplete)
     })
     MessageBus.i.subscribe('control/dhtml/ready', this.removeLoadingIcon)
-    MessageBus.i.subscribe('control/case/ready', this.removeLoadingIcon)
+    MessageBus.i.subscribe('case/ready/+', this.removeLoadingIcon)
     MessageBus.i.subscribe('control/validate/ready', this.removeLoadingIcon)
     MessageBus.i.subscribe('control/html/ready', this.pageReady)
   }
diff --git a/src/adonisjs/public/infra/token-validator.js b/src/adonisjs/public/infra/token-validator.js
index 5d835dee0..3f81769df 100644
--- a/src/adonisjs/public/infra/token-validator.js
+++ b/src/adonisjs/public/infra/token-validator.js
@@ -35,7 +35,8 @@ class TokenController {
             // localStorage.setItem('harena-user-grade', endpointResponse.data.grade)
             // localStorage.setItem('harena-user-institution', endpointResponse.data.institution)
             // localStorage.setItem('harena-user-institution-id', endpointResponse.data.institutionId)
-            MessageBus.i.publish('data/user/info', endpointResponse.data)
+            MessageBus.i.publish('user/login/' + endpointResponse.data.userId,
+                                 endpointResponse.data, true)
             TokenController.instance.changeHeaderButtons(endpointResponse.data)
           })
           .catch(function (error) {
@@ -111,7 +112,8 @@ class TokenController {
           // localStorage.setItem('harena-user-grade', endpointResponse.data.grade)
           // localStorage.setItem('harena-user-institution', endpointResponse.data.institution)
           // localStorage.setItem('harena-user-institution-id', endpointResponse.data.institutionId)
-          MessageBus.i.publish('data/user/info', endpointResponse.data)
+          MessageBus.i.publish('user/login/' + endpointResponse.data.userId,
+                               endpointResponse.data, true)
 
           TokenController.instance.changeHeaderButtons(endpointResponse.data)
         } else{
diff --git a/src/adonisjs/public/player/js/caselist.js b/src/adonisjs/public/player/js/caselist.js
index 8bd8428d9..05e9a6791 100644
--- a/src/adonisjs/public/player/js/caselist.js
+++ b/src/adonisjs/public/player/js/caselist.js
@@ -4,7 +4,7 @@ class CaseQueueManager {
 
     this._nextCase = this._nextCase.bind(this)
 
-    MessageBus.i.subscribe('case/+/navigate', this._nextCase)
+    MessageBus.i.subscribe('case/navigate/+', this._nextCase)
     this.start()
   }
 
diff --git a/src/adonisjs/public/player/js/htracker.js b/src/adonisjs/public/player/js/htracker.js
index c70c81ec4..b53844528 100644
--- a/src/adonisjs/public/player/js/htracker.js
+++ b/src/adonisjs/public/player/js/htracker.js
@@ -10,77 +10,83 @@ class Tracker {
     this._caseCompleted = false
 
     this.inputReady = this.inputReady.bind(this)
-    MessageBus.i.subscribe('var/+/input/ready', this.inputReady)
+    MessageBus.i.subscribe('input/ready/#', this.inputReady)
     this.inputMandatory = this.inputMandatory.bind(this)
-    MessageBus.i.subscribe('var/+/input/mandatory', this.inputMandatory)
-    this.groupinputReady = this.groupinputReady.bind(this)
-    MessageBus.i.subscribe('var/+/group_input/ready', this.groupinputReady)
-    this.subinputReady = this.subinputReady.bind(this)
-    MessageBus.i.subscribe('var/+/subinput/ready', this.subinputReady)
+    MessageBus.i.subscribe('input/mandatory/#', this.inputMandatory)
     this.inputTyped = this.inputTyped.bind(this)
-    MessageBus.i.subscribe('var/+/typed', this.inputTyped)
+    MessageBus.i.subscribe('input/typed/#', this.inputTyped)
     this.inputChanged = this.inputChanged.bind(this)
-    MessageBus.i.subscribe('var/+/changed', this.inputChanged)
+    MessageBus.i.subscribe('input/changed/#', this.inputChanged)
     this.stateChanged = this.stateChanged.bind(this)
-    MessageBus.i.subscribe('var/+/state_changed', this.stateChanged)
-    this.allMandatoryFilled = this.allMandatoryFilled.bind(this)
-    MessageBus.i.subscribe('var/*/input/mandatory/get', this.allMandatoryFilled)
+    MessageBus.i.subscribe('input/state/#', this.stateChanged)
 
     this.knotStart = this.knotStart.bind(this)
-    MessageBus.i.subscribe('knot/+/start', this.knotStart)
+    MessageBus.i.subscribe('knot/start/#', this.knotStart)
     this.caseCompleted = this.caseCompleted.bind(this)
-    MessageBus.i.subscribe('case/completed', this.caseCompleted)
+    MessageBus.i.subscribe('case/completed/+', this.caseCompleted)
     MessageBus.i.subscribe('session/close', this.caseCompleted)
 
     this.submitVariables = this.submitVariables.bind(this)
-    MessageBus.i.subscribe('control/input/submit', this.submitVariables)
+    MessageBus.i.subscribe('input/submit/*', this.submitVariables)
   }
 
-  inputMandatory (topic, message) {
-    const v = MessageBus.extractLevel(topic, 2)
-    if (v != null) {
-      this._mandatoryFilled[v] = { message: message, filled: false }
-    }
+  _extractEntityId (topic, position) {
+    return MessageBus.extractLevelsSegment(topic, position).replace(/\//g, '.')
   }
 
-  inputReady (topic, message) {
-    this._initializeVariable(topic, '')
+  _exportEntityId (entity) {
+    return entity.replace(/\./g, '/')
   }
 
-  groupinputReady (topic, message) {
-    this._initializeVariable(topic, {})
-    this._groupInput = MessageBus.extractLevel(topic, 2)
+  inputMandatory (topic, message, track) {
+    if (MessageBus.extractLevel(topic, 3) == '*')
+      MessageBus.i.publishHasResponse(
+        topic, message, this._mandatoryFilled, track)
+    else {
+      const v = this._extractEntityId(topic, 3)
+      if (v != null)
+        this._mandatoryFilled[v] = { message: message, filled: false }
+    }
   }
 
-  subinputReady (topic, message) {
-    if (this._groupInput != null) {
-      const id = MessageBus.extractLevel(topic, 2)
-      this._variables[this._groupInput][id] =
-            { content: message.content, state: ' ' }
-    }
+  inputReady (topic, message) {
+    const type = MessageBus.extractLevel(topic, 3)
+    const position = (type == '<' || type == '>') ? 4 : 3
+    const v = this._extractEntityId(topic, position)
+    if (v != null && this._variables[v] == null)
+      switch (type) {
+        case '<' : this._updateVariable(v, {})
+                   this._groupInput = v
+                   break
+        case '>' : if (this._groupInput != null)
+                     this._variables[this._groupInput][v] =
+                       { content: message.content, state: ' ' }
+              break
+        default: this._updateVariable(v, '')
+      }
   }
 
   inputTyped (topic, message) {
-    this._updateVariable(topic, message.value)
+    this._updateVariable(this._extractEntityId(topic, 3), message.value)
     // this._changedVariable(topic, message.value) <FUTURE>
   }
 
   inputChanged (topic, message) {
-    this._updateVariable(topic, message.value)
+    this._updateVariable(this._extractEntityId(topic, 3), message.value)
     // this._changedVariable(topic, message.value) <FUTURE>
   }
 
   stateChanged (topic, message) {
-    if (this._groupInput != null) {
-      const id = MessageBus.extractLevel(topic, 2)
-      this._variables[this._groupInput][id].state = message.state
-    }
+    if (this._groupInput != null)
+      this._variables[this._groupInput][this._extractEntityId(topic, 3)].state =
+        message.state
   }
 
   submitVariables (topic, message) {
     for (const v in this._variables) {
       if (this._varUpdated[v] == null || this._varUpdated[v]) {
-        MessageBus.i.publish('var/' + v + '/set', this._variables[v], true)
+        MessageBus.i.publish('var/set/' + this._exportEntityId(v),
+                             this._variables[v], true)
         this._varUpdated[v] = false
       }
     }
@@ -100,32 +106,19 @@ class Tracker {
   }
   */
 
-  _updateVariable (topic, value) {
-    const v = MessageBus.extractLevel(topic, 2)
-    if (v != null) {
-      this._variables[v] = value
-      this._varUpdated[v] = true
-      if (this._mandatoryFilled[v] !== undefined) {
-        this._mandatoryFilled[v].filled = (value.length > 0) }
+  _updateVariable (variable, value) {
+    if (variable != null) {
+      this._variables[variable] = value
+      this._varUpdated[variable] = true
+      if (this._mandatoryFilled[variable] !== undefined) {
+        this._mandatoryFilled[variable].filled = (value.length > 0) }
     }
   }
 
-  _initializeVariable (topic, value) {
-    const v = MessageBus.extractLevel(topic, 2)
-    if (v != null && this._variables[v] == null)
-      this._updateVariable(topic, value)
-  }
-
-  allMandatoryFilled (topic, message, track) {
-    MessageBus.i.publish(MessageBus.buildResponseTopic(topic, message),
-      this._mandatoryFilled, track)
-  }
-
   knotStart (topic, message) {
-    const k = MessageBus.extractLevel(topic, 2)
     const currentDateTime = new Date()
     this._knotTrack.push(
-      {knotid: k,
+      {knotid: this._extractEntityId(topic, 3),
        timeStart: currentDateTime.toJSON()})
   }
 
@@ -139,8 +132,10 @@ class Tracker {
       if (message && message.knotid)
         kt.knotid = message.knotid
       this._knotTrack.push(kt)
-      MessageBus.i.publish('case/summary',
-        {knotTrack: this._knotTrack,
+      MessageBus.i.publish('case/summary/' + MessageBus.extractLevel(topic, 3),
+        {userId: message.userId,
+         caseId: message.caseId,
+         knotTrack: this._knotTrack,
          variables: this._variables}, true)
     }
   }
diff --git a/src/adonisjs/public/player/js/player.js b/src/adonisjs/public/player/js/player.js
index d35d05cc2..ee509333b 100644
--- a/src/adonisjs/public/player/js/player.js
+++ b/src/adonisjs/public/player/js/player.js
@@ -11,10 +11,9 @@ class PlayerManager {
     this.controlEvent = this.controlEvent.bind(this)
     MessageBus.i.subscribe('control/#', this.controlEvent)
     this.navigateEvent = this.navigateEvent.bind(this)
-    MessageBus.i.subscribe('knot/+/navigate', this.navigateEvent)
-    MessageBus.i.subscribe('flow/+/navigate', this.navigateEvent)
-    MessageBus.i.subscribe('case/+/navigate', this.navigateEvent)
-    MessageBus.i.subscribe('variable/+/navigate', this.navigateEvent)
+    MessageBus.i.subscribe('knot/navigate/#', this.navigateEvent)
+    MessageBus.i.subscribe('flow/navigate/+', this.navigateEvent)
+    MessageBus.i.subscribe('case/navigate/+', this.navigateEvent)
     MessageBus.i.subscribe('session/close', this.navigateEvent)
 
     this._notesStack = []
@@ -24,7 +23,7 @@ class PlayerManager {
     MessageBus.i.subscribe('/report/get', this.produceReport)
 
     this.caseCompleted = this.caseCompleted.bind(this)
-    MessageBus.i.subscribe('case/completed', this.caseCompleted)
+    MessageBus.i.subscribe('case/completed/+', this.caseCompleted)
 
     // tracking
     this.trackTyping = this.trackTyping.bind(this)
@@ -47,124 +46,120 @@ class PlayerManager {
   }
 
   async navigateEvent (topic, message) {
-    let target = MessageBus.extractLevel(topic, 2)
-    this.trackTrigger(target)
-
-    let mandatoryEmpty = null
-    const mandatoryM = await MessageBus.i.request('var/*/input/mandatory/get')
-    for (const m in mandatoryM.message) {
-      if (mandatoryM.message[m].filled == false && mandatoryEmpty == null) {
-        mandatoryEmpty = mandatoryM.message[m].message }
-    }
-
-    if (mandatoryEmpty != null) {
-      MessageBus.i.publish(topic + '/blocked', 'Input missing: ' + mandatoryEmpty, true)
-      await DCCNoticeInput.displayNotice(
-        'You must answer the question: ' + mandatoryEmpty,
-        'message', 'Ok')
-    } else {
-      if (this._currentKnot != null) {
-        MessageBus.i.publish('control/input/submit', null, true) // <TODO> provisory
-        MessageBus.i.publish('knot/' + this._currentKnot + '/end', null, true)
+    if (MessageBus.extractLevel(topic, 3) != '!') { // navigation blocked
+      let target =
+        MessageBus.extractLevelsSegment(topic,
+          (MessageBus.extractLevel(topic, 3) == '=') ? 4 : 3).replace(/\//g, '.')
+      this.trackTrigger(target)
+
+      let mandatoryEmpty = null
+      const mandatoryM = await MessageBus.i.request('input/mandatory/*')
+      for (const m in mandatoryM.message) {
+        if (mandatoryM.message[m].filled == false && mandatoryEmpty == null) {
+          mandatoryEmpty = mandatoryM.message[m].message }
       }
 
-      switch (topic) {
-        case 'knot/</navigate':
-          if (this._notesStack.length > 0) {
-            const panel = this._notesStack.pop()
-            this._mainPanel.removeChild(panel)
-          }
-          if (this._state.historyHasPrevious()) {
-            // removes the panel to rebuild it
+      if (mandatoryEmpty != null) {
+        MessageBus.i.publish(MessageBus.extractLevelsSegment(topic, 1, 2) + '/!',
+                             'Input missing: ' + mandatoryEmpty, true)
+        await DCCNoticeInput.displayNotice(
+          'You must answer the question: ' + mandatoryEmpty,
+          'message', 'Ok')
+      } else {
+        if (this._currentKnot != null) {
+          MessageBus.i.publish('input/submit/*', null, true) // <TODO> provisory
+          MessageBus.i.publish('knot/end/' + this._currentKnot.replace(/\./g, '/'),
+                               null, true)
+        }
+
+        switch (topic) {
+          case 'knot/navigate/<':
             if (this._notesStack.length > 0) {
               const panel = this._notesStack.pop()
               this._mainPanel.removeChild(panel)
             }
-            this.knotLoad(this._state.historyPrevious())
-          }
-          break
-        case 'knot/<</navigate': this.startCase()
-          const flowStart = this._nextFlowKnot()
-          const startKnot = (flowStart != null)
-                               ? flowStart.target
-                               : (DCCPlayerServer.localEnv)
-                                 ? DCCPlayerServer.playerObj.start
-                                 : this._compiledCase.start
-          // console.log("=== start");
-          // console.log(startKnot);
-          this._state.historyRecord(startKnot)
-          this.knotLoad(startKnot)
-          break
-        case 'knot/>/navigate': const nextKnot = this._state.nextKnot()
-          this._state.historyRecord(nextKnot)
-          this.knotLoad(nextKnot)
-          break
-        case 'flow/>/navigate': const flowNext = this._nextFlowKnot()
-          if (flowNext != null) {
-            // console.log('=== flow next')
-            // console.log(flowNext)
-            this._state.historyRecord(flowNext.target)
-            this.knotLoad(flowNext.target)
-          }
-          break
-        case 'case/>/navigate':
-          // <TODO> jumping other instructions - improve it
-          // console.log('=== next case')
-          let instruction
-          do {
-            instruction = this._state.metascriptNextInstruction()
-          } while (instruction != null && instruction.type != 'divert-script' &&
-                        instruction.target.substring(0, 5).toLowerCase() != 'case.')
-
-          // console.log(instruction)
-          if (instruction != null) {
-            if (instruction.parameter) {
-              // console.log("=== metaparameter");
-              // console.log(instruction.parameter.parameter);
-              this._state.metaexecParameterSet(instruction.parameter.parameter)
+            if (this._state.historyHasPrevious()) {
+              // removes the panel to rebuild it
+              if (this._notesStack.length > 0) {
+                const panel = this._notesStack.pop()
+                this._mainPanel.removeChild(panel)
+              }
+              this.knotLoad(this._state.historyPrevious())
+            }
+            break
+          case 'knot/navigate/<<': this.startCase()
+            const flowStart = this._nextFlowKnot()
+            const startKnot = (flowStart != null)
+                                 ? flowStart.target
+                                 : (DCCPlayerServer.localEnv)
+                                   ? DCCPlayerServer.playerObj.start
+                                   : this._compiledCase.start
+            // console.log("=== start");
+            // console.log(startKnot);
+            this._state.historyRecord(startKnot)
+            this.knotLoad(startKnot)
+            break
+          case 'knot/navigate/>': const nextKnot = this._state.nextKnot()
+            this._state.historyRecord(nextKnot)
+            this.knotLoad(nextKnot)
+            break
+          case 'flow/navigate/>': const flowNext = this._nextFlowKnot()
+            if (flowNext != null) {
+              // console.log('=== flow next')
+              // console.log(flowNext)
+              this._state.historyRecord(flowNext.target)
+              this.knotLoad(flowNext.target)
+            }
+            break
+          case 'case/navigate/>':
+            // <TODO> jumping other instructions - improve it
+            // console.log('=== next case')
+            let instruction
+            do {
+              instruction = this._state.metascriptNextInstruction()
+            } while (instruction != null && instruction.type != 'divert-script' &&
+                          instruction.target.substring(0, 5).toLowerCase() != 'case.')
+
+            // console.log(instruction)
+            if (instruction != null) {
+              if (instruction.parameter) {
+                // console.log("=== metaparameter");
+                // console.log(instruction.parameter.parameter);
+                this._state.metaexecParameterSet(instruction.parameter.parameter)
+              }
+              window.open('index.html?case=' +
+                       instruction.target.substring(5) +
+                       (this._previewCase ? '&preview' : ''), '_self')
+            }
+            break
+          case 'session/close':
+            this.sessionClose()
+            break
+          default: if (MessageBus.matchFilter(topic, 'knot/navigate/#')) {
+            if (MessageBus.matchFilter(topic, 'knot/navigate/=/#')) {
+              const result = await MessageBus.i.request(
+                'var/get/' + target.replace(/\./g, '/'), null, null, true)
+              target = Translator.instance.findContext(
+                this._compiledCase.knots, this._currentKnot,
+                result.message)
+            }
+            this._state.historyRecord(target)
+            if (message.value) {
+              this._state.parameter = message.value
+              this.knotLoad(target, message.value)
+            } else {
+              this._state.parameter = null
+              this.knotLoad(target)
+            }
+          } else if (MessageBus.matchFilter(topic, 'case/navigate/+')) {
+            if (message) {
+              this._state.metaexecParameterSet(message.parameter)
             }
-            window.open('index.html?case=' +
-                     instruction.target.substring(5) +
-                     (this._previewCase ? '&preview' : ''), '_self')
+            window.open('index.html?case=' + target +
+                             (this._previewCase ? '&preview' : ''), '_self')
           }
           break
-        case 'session/close':
-          this.sessionClose()
-          break
-        default: if (MessageBus.matchFilter(topic, 'knot/+/navigate') ||
-                         MessageBus.matchFilter(topic, 'variable/+/navigate')) {
-          /*
-                        console.log("=== variable navigate");
-                        console.log(target);
-                        */
-          if (MessageBus.matchFilter(topic, 'variable/+/navigate')) {
-            const result = await MessageBus.i.request('var/' + target + '/get', null, null, true)
-            target = Translator.instance.findContext(
-              this._compiledCase.knots, this._currentKnot,
-              result.message)
-            /*
-                           console.log("=== variable resolved");
-                           console.log(target);
-                           */
-          }
-          this._state.historyRecord(target)
-          if (message.value) {
-            this._state.parameter = message.value
-            this.knotLoad(target, message.value)
-          } else {
-            this._state.parameter = null
-            this.knotLoad(target)
-          }
-        } else if (MessageBus.matchFilter(topic, 'case/+/navigate')) {
-          if (message) {
-            // console.log("=== metaparameter");
-            // console.log(message.parameter);
-            this._state.metaexecParameterSet(message.parameter)
-          }
-          window.open('index.html?case=' + target +
-                           (this._previewCase ? '&preview' : ''), '_self')
         }
-        break
       }
     }
   }
@@ -226,7 +221,7 @@ class PlayerManager {
         await this._caseLoad(this._state.currentCase)
 
         this._caseFlow()
-        MessageBus.i.publish('knot/<</navigate', null, true)
+        MessageBus.i.publish('knot/navigate/<<', null, true)
       } else { this._state.sessionCompleted() }
     }
 
@@ -275,7 +270,7 @@ class PlayerManager {
           this._caseFlow()
         }
       }
-      MessageBus.i.publish('knot/<</navigate', null, true)
+      MessageBus.i.publish('knot/navigate/<<', null, true)
       // this.knotLoad("entry");
     }
   }
@@ -287,7 +282,7 @@ class PlayerManager {
     const caseObj = await MessageBus.i.request(
       'service/request/get', {caseId: Basic.service.currentCaseId}, null, true)
     */
-    const caseObj = await MessageBus.i.request('data/case/' + Basic.service.currentCaseId + '/get', null, null, true)
+    const caseObj = await MessageBus.i.request('case/get/' + Basic.service.currentCaseId, null, null, true)
 
     this._currentCaseTitle = caseObj.message.title
 
@@ -299,7 +294,7 @@ class PlayerManager {
     this._knots = this._compiledCase.knots
     // Basic.service.currentThemeFamily = this._compiledCase.theme
     Basic.service.composedThemeFamily(this._compiledCase.theme)
-    MessageBus.i.publish('control/case/ready', null, true)
+    MessageBus.i.publish('case/ready/' + Basic.service.currentCaseId, null, true)
   }
 
   _caseFlow () {
@@ -350,7 +345,8 @@ class PlayerManager {
       */
     if (!DCCPlayerServer.localEnv) {
       if (parameter) {
-        MessageBus.i.publish('var/' + knotName + '.parameter/set', parameter, true)
+        MessageBus.i.publish(
+          'var/set/' + knotName.replace(/\./g, '/') + '/parameter', parameter, true)
       }
       if (this._compiledCase.role && this._compiledCase.role == 'metacase' &&
              this._knots[knotName].categories &&
@@ -366,11 +362,15 @@ class PlayerManager {
         if (note) { this.presentNote(knot) } else { this.presentKnot(knot) }
       }
     }
-    MessageBus.i.publish('knot/' + knotName + '/start', null, true)
+    MessageBus.i.publish('knot/start/' + knotName.replace(/\./g, '/'),
+                         null, true)
 
     if (this._knots[knotName].categories &&
         this._knots[knotName].categories.includes('end'))
-    { MessageBus.i.publish('case/completed', {knotid: knotName}, true) }
+      MessageBus.i.publish('case/completed/' + this._state.runningCase.runningId,
+                           {userId: this._state.userid,
+                            caseId: Basic.service.currentCaseId,
+                            knotid: knotName}, true)
   }
 
   caseCompleted (topic, message) {
@@ -502,13 +502,18 @@ class PlayerManager {
 
       this._state.runningCase = runningCase
       MessageBus.i.defineRunningCase(runningCase)
+      MessageBus.i.publish('case/start/' + runningCase.runningId,
+                           {userId: this._state.userid,
+                            caseId: Basic.service.currentCaseId}, true)
     }
   }
 
   resumeCase () {
     if (!PlayerManager.isCapsule) {
       // <TODO> this._runningCase is provisory
-      MessageBus.i.publish('case/' + this._state.currentCase + '/resume', this._state.runningCase, true)
+      MessageBus.i.publish('case/resume/' + this._state.runningCase,
+                           {userId: this._state.userid,
+                            caseId: this._state.currentCase}, true)
 
       MessageBus.i.defineRunningCase(this._state.runningCase)
     }
diff --git a/src/adonisjs/public/player/js/state.js b/src/adonisjs/public/player/js/state.js
index 5535280eb..49a8848ea 100644
--- a/src/adonisjs/public/player/js/state.js
+++ b/src/adonisjs/public/player/js/state.js
@@ -28,12 +28,13 @@ class PlayState {
 
     this._metastate = {}
 
+    this.sessionRecord = this.sessionRecord.bind(this)
+    MessageBus.i.subscribe('user/login/+', this.sessionRecord)
+
     this.variableGet = this.variableGet.bind(this)
-    MessageBus.i.subscribe('var/+/get', this.variableGet)
+    MessageBus.i.subscribe('var/get/#', this.variableGet)
     this.variableSet = this.variableSet.bind(this)
-    MessageBus.i.subscribe('var/+/set', this.variableSet)
-    this.variableSubGet = this.variableSubGet.bind(this)
-    MessageBus.i.subscribe('var/+/get/sub', this.variableSubGet)
+    MessageBus.i.subscribe('var/set/#', this.variableSet)
   }
 
   /*
@@ -50,9 +51,8 @@ class PlayState {
     return (state == null || state.completed) ? null : state
   }
 
-  sessionRecord (userid, token) {
-    this._state.userid = userid
-    this._state.token = token
+  sessionRecord (topic) {
+    this._state.userid = MessageBus.extractLevel(topic, 3)
     this._stateStore()
   }
 
@@ -121,53 +121,55 @@ class PlayState {
     * Scenario Variables
     */
 
+  _extractEntityId (topic) {
+    return MessageBus.extractLevelsSegment(topic, 3).replace(/\//g, '.')
+  }
+
   variableGet (topic, message, track) {
-    let id = MessageBus.extractLevel(topic, 2)
+    const type = MessageBus.extractLevel(topic, 3)
+    let id = this._extractEntityId(topic, (type == '>') ? 4 : 3)
 
-    if (id != null)
+    if (id != null) {
       id = id.toLowerCase()
 
-    if (id != null && id.startsWith('previous.')) {
-      const previousKnot = this.historyPreviousId().toLowerCase()
-      if (previousKnot != null) { id = previousKnot + '.' + id.substring(9) }
-    }
-
-    if (id == '*')
-      MessageBus.i.publish(MessageBus.buildResponseTopic(topic, message),
-                           this._state.variables, track)
-    else {
-      // tries to give a scope to the variable
-      if (id != null && this._state.variables[id] == null) {
-        const currentKnot = this.historyCurrent()
-        if (currentKnot != null &&
-            this._state.variables[currentKnot + '.' + id] != null) { id = currentKnot + '.' + id }
+      if (id.startsWith('previous.')) {
+        const previousKnot = this.historyPreviousId().toLowerCase()
+        if (previousKnot != null) { id = previousKnot + '.' + id.substring(9) }
       }
 
-      if (id != null) {
-        MessageBus.i.publish(MessageBus.buildResponseTopic(topic, message),
-          this._state.variables[id], track)
+      switch (type) {
+        case '*':
+          MessageBus.i.publishHasResponse (
+            topic, message, this._state.variables, track)
+          break
+        case '>':
+          let result = null
+          while (this._state.variables[id] === undefined && id.indexOf('.') > -1)
+            id = id.substring(id.indexOf('.') + 1)
+          if (this._state.variables[id]) {
+            for (const v in this._state.variables[id]) {
+              if (this._state.variables[id][v].content == message.body)
+                result = this._state.variables[id][v].state
+            }
+          }
+          MessageBus.i.publishHasResponse (topic, message, result, track)
+          break
+        default:
+          // tries to give a scope to the variable
+          if (this._state.variables[id] == null) {
+            const currentKnot = this.historyCurrent()
+            if (currentKnot != null &&
+                this._state.variables[currentKnot + '.' + id] != null)
+              id = currentKnot + '.' + id
+          }
+          MessageBus.i.publishHasResponse (
+            topic, message, this._state.variables[id], track)
       }
     }
   }
 
-  variableSubGet (topic, message, track) {
-    const completeId = MessageBus.extractLevel(topic, 2)
-    if (completeId != null) {
-      let result = null
-      let id = completeId
-      while (this._state.variables[id] === undefined && id.indexOf('.') > -1) { id = id.substring(id.indexOf('.') + 1) }
-      if (this._state.variables[id]) {
-        for (const v in this._state.variables[id]) {
-          if (this._state.variables[id][v].content == message.body) { result = this._state.variables[id][v].state }
-        }
-      }
-      MessageBus.i.publish(MessageBus.buildResponseTopic(topic, message),
-        result, track)
-    }
-  }
-
   variableSet (topic, message, track) {
-    const id = MessageBus.extractLevel(topic, 2)
+    const id = this._extractEntityId(topic, 3)
     let status = false
     const content =
       (message.responseStamp != null && message.body != null) ?
@@ -183,8 +185,8 @@ class PlayState {
       status = true
     }
     this._stateStore()
-    MessageBus.i.publish(MessageBus.buildResponseTopic(topic, message),
-      status, track)
+
+    MessageBus.i.publishHasResponse(topic, message, status, track)
  }
 
   /*
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts-plus.js b/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts-plus.js
index 220d6878d..0aa311a69 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts-plus.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts-plus.js
@@ -51,7 +51,7 @@
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>`,
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>`,
 `Selecione um dos ícones abaixo para editar o ambiente:
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:10%; max-width:48px; max-height:48px; margin-right:10px">
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts.js b/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts.js
index d64321b52..47da8f662 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-scripts.js
@@ -55,7 +55,7 @@
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>`,
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>`,
 `Selecione um dos ícones abaixo para editar o ambiente:
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:10%; max-width:48px; max-height:48px; margin-right:10px">
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-sliders.js b/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-sliders.js
index 4fcb7c507..427f16773 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-sliders.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/aquarium-sliders.js
@@ -80,7 +80,7 @@
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>`,
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>`,
 `Selecione um dos ícones abaixo para editar o ambiente:
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:10%; max-width:48px; max-height:48px; margin-right:10px">
@@ -159,16 +159,16 @@ Selecione abaixo a chance de cada um dos eventos:
    </div>
 </div>
 
-<subscribe-dcc target="alga-replicates" topic="var/alga_replicates/changed" map="probability">
+<subscribe-dcc target="alga-replicates" topic="input/changed/alga_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="alga-dies" topic="var/alga_dies/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="nematode-replicates" topic="var/herbivor_replicates/changed" map="probability">
+<subscribe-dcc target="alga-dies" topic="input/changed/alga_dies" map="probability"></subscribe-dcc>
+<subscribe-dcc target="nematode-replicates" topic="input/changed/herbivor_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="nematode-dies" topic="var/herbivor_dies/changed" map="probability">
+<subscribe-dcc target="nematode-dies" topic="input/changed/herbivor_dies" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-replicates" topic="var/carnivor_replicates/changed" map="probability">
+<subscribe-dcc target="tardigrade-replicates" topic="input/changed/carnivor_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-dies" topic="var/carnivor_dies/changed" map="probability">
+<subscribe-dcc target="tardigrade-dies" topic="input/changed/carnivor_dies" map="probability">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/boids.js b/src/adonisjs/public/scripts/playground/gallery/cell/boids.js
index 0c6018ada..ab30c76d0 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/boids.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/boids.js
@@ -35,7 +35,7 @@ _________________
 <dcc-timer cycles="100000" interval="1000" publish="state/next">
    <subscribe-dcc topic="timer/start" map="start"></subscribe-dcc>
    <subscribe-dcc topic="timer/stop" map="stop"></subscribe-dcc>
-   <subscribe-dcc topic="var/timer_interval/changed" map="interval"></subscribe-dcc>
+   <subscribe-dcc topic="input/changed/timer_interval" map="interval"></subscribe-dcc>
 </dcc-timer>
 
 <subscribe-dcc target="cellular-space" topic="type/#"></subscribe-dcc>
@@ -44,7 +44,7 @@ _________________
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="space/edit" map="edit"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="space/view" map="view"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>
 
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:20%; max-width:96px; max-height:48px; margin-right:10px">
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/cerrado-sliders.js b/src/adonisjs/public/scripts/playground/gallery/cell/cerrado-sliders.js
index 5305bff1e..47bd78a52 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/cerrado-sliders.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/cerrado-sliders.js
@@ -80,7 +80,7 @@
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>`,
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>`,
 `Selecione um dos ícones abaixo para editar o ambiente:
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:10%; max-width:48px; max-height:48px; margin-right:10px">
@@ -159,16 +159,16 @@ Selecione abaixo a chance de cada um dos eventos:
    </div>
 </div>
 
-<subscribe-dcc target="alga-replicates" topic="var/alga_replicates/changed" map="probability">
+<subscribe-dcc target="alga-replicates" topic="input/changed/alga_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="alga-dies" topic="var/alga_dies/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="nematode-replicates" topic="var/herbivor_replicates/changed" map="probability">
+<subscribe-dcc target="alga-dies" topic="input/changed/alga_dies" map="probability"></subscribe-dcc>
+<subscribe-dcc target="nematode-replicates" topic="input/changed/herbivor_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="nematode-dies" topic="var/herbivor_dies/changed" map="probability">
+<subscribe-dcc target="nematode-dies" topic="input/changed/herbivor_dies" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-replicates" topic="var/carnivor_replicates/changed" map="probability">
+<subscribe-dcc target="tardigrade-replicates" topic="input/changed/carnivor_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-dies" topic="var/carnivor_dies/changed" map="probability">
+<subscribe-dcc target="tardigrade-dies" topic="input/changed/carnivor_dies" map="probability">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale-ruler.js b/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale-ruler.js
index 4cf0f867f..9f0e3d7f9 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale-ruler.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale-ruler.js
@@ -37,7 +37,7 @@
 <dcc-timer cycles="100000" interval="1" publish="state/next">
    <subscribe-dcc topic="timer/start" map="start"></subscribe-dcc>
    <subscribe-dcc topic="timer/stop" map="stop"></subscribe-dcc>
-   <subscribe-dcc topic="var/timer_interval/changed" map="interval"></subscribe-dcc>
+   <subscribe-dcc topic="input/changed/timer_interval" map="interval"></subscribe-dcc>
 </dcc-timer>
 
 <subscribe-dcc target="cellular-space" topic="type/#"></subscribe-dcc>
@@ -46,7 +46,7 @@
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="space/edit" map="edit"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="space/view" map="view"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>
 
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:20%; max-width:96px; max-height:48px; margin-right:10px">
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale.js b/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale.js
index c478f0c20..f2b929fee 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer-scale.js
@@ -33,14 +33,14 @@
 <dcc-timer cycles="100000" interval="1" publish="state/next">
    <subscribe-dcc topic="timer/start" map="start"></subscribe-dcc>
    <subscribe-dcc topic="timer/stop" map="stop"></subscribe-dcc>
-   <subscribe-dcc topic="var/timer_interval/changed" map="interval"></subscribe-dcc>
+   <subscribe-dcc topic="input/changed/timer_interval" map="interval"></subscribe-dcc>
 </dcc-timer>
 
 <subscribe-dcc target="cellular-space" topic="type/#"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row">
    <div style="flex:20%; max-width:96px; max-height:48px">
       <img style="max-width:48px; max-height:48px; margin-left:24px; margin-right:24px"
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer.js b/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer.js
index 3d09bf702..0cc56b4d0 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/expression-rocket-wide-timer.js
@@ -29,14 +29,14 @@
 <dcc-timer cycles="100000" interval="1000" publish="state/next">
    <subscribe-dcc topic="timer/start" map="start"></subscribe-dcc>
    <subscribe-dcc topic="timer/stop" map="stop"></subscribe-dcc>
-   <subscribe-dcc topic="var/timer_interval/changed" map="interval"></subscribe-dcc>
+   <subscribe-dcc topic="input/changed/timer_interval" map="interval"></subscribe-dcc>
 </dcc-timer>
 
 <subscribe-dcc target="cellular-space" topic="type/#"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row">
    <div style="flex:20%; max-width:96px; max-height:48px">
       <img style="max-width:48px; max-height:48px; margin-left:24px; margin-right:24px"
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/microworld-scripts.js b/src/adonisjs/public/scripts/playground/gallery/cell/microworld-scripts.js
index 1afdca7e9..28a0635f3 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/microworld-scripts.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/microworld-scripts.js
@@ -35,7 +35,7 @@
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>`,
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>`,
 `Selecione um dos ícones abaixo para editar o ambiente:
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:10%; max-width:48px; max-height:48px; margin-right:10px">
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/microworld-sliders.js b/src/adonisjs/public/scripts/playground/gallery/cell/microworld-sliders.js
index b5c88dd03..c644c6c41 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/microworld-sliders.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/microworld-sliders.js
@@ -79,7 +79,7 @@
 <subscribe-dcc target="cellular-space" topic="state/next" map="next"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/save" map="save"></subscribe-dcc>
 <subscribe-dcc target="cellular-space" topic="state/reset" map="reset"></subscribe-dcc>
-<subscribe-dcc target="cellular-space" topic="var/space_scale/changed" map="scale"></subscribe-dcc>`,
+<subscribe-dcc target="cellular-space" topic="input/changed/space_scale" map="scale"></subscribe-dcc>`,
 `Selecione um dos ícones abaixo para editar o ambiente:
 <div style="flex:48px; max-height:48px; display:flex; flex-direction:row; border:2px">
    <div style="flex:10%; max-width:48px; max-height:48px; margin-right:10px">
@@ -153,16 +153,16 @@ Selecione abaixo a chance de cada um dos eventos:
    </div>
 </div>
 
-<subscribe-dcc target="alga-replicates" topic="var/alga_replicates/changed" map="probability">
+<subscribe-dcc target="alga-replicates" topic="input/changed/alga_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="alga-dies" topic="var/alga_dies/changed" map="probability"></subscribe-dcc>
-<subscribe-dcc target="nematode-replicates" topic="var/nematode_replicates/changed" map="probability">
+<subscribe-dcc target="alga-dies" topic="input/changed/alga_dies" map="probability"></subscribe-dcc>
+<subscribe-dcc target="nematode-replicates" topic="input/changed/nematode_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="nematode-dies" topic="var/nematode_dies/changed" map="probability">
+<subscribe-dcc target="nematode-dies" topic="input/changed/nematode_dies" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-replicates" topic="var/tardigrade_replicates/changed" map="probability">
+<subscribe-dcc target="tardigrade-replicates" topic="input/changed/tardigrade_replicates" map="probability">
 </subscribe-dcc>
-<subscribe-dcc target="tardigrade-dies" topic="var/tardigrade_dies/changed" map="probability">
+<subscribe-dcc target="tardigrade-dies" topic="input/changed/tardigrade_dies" map="probability">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge1.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge1.js
index 486a2c691..d188b84ab 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge1.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge1.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="100" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge2.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge2.js
index 989f3a8a6..d9f457ff3 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge2.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge2.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="100" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge3.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge3.js
index cd9be45d8..7229fd189 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge3.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge3.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="100" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge4.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge4.js
index 4dbba8fc2..580980d65 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge4.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge4.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="100" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge5.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge5.js
index 98a1fc5c9..848e5d433 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge5.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge5.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="100" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge6.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge6.js
index 4a3ef396c..73ed3b841 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge6.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-challenge6.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="100" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-train1.js b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-train1.js
index 09bd6f4e1..04b3fd2ed 100644
--- a/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-train1.js
+++ b/src/adonisjs/public/scripts/playground/gallery/cell/zombie-wall-train1.js
@@ -104,7 +104,7 @@ Configure a transparência do teto:
       <dcc-slider variable="cover_opacity" value="0" index></dcc-slider>
    </div>
 </div>
-<subscribe-dcc target="cellular-space" topic="var/cover_opacity/changed" map="cover-opacity">
+<subscribe-dcc target="cellular-space" topic="input/changed/cover_opacity" map="cover-opacity">
 </subscribe-dcc>`
   )
 })()
diff --git a/src/adonisjs/public/themes/jacinto/detailed.html b/src/adonisjs/public/themes/jacinto/detailed.html
index d8fc4a358..43f3121f0 100644
--- a/src/adonisjs/public/themes/jacinto/detailed.html
+++ b/src/adonisjs/public/themes/jacinto/detailed.html
@@ -641,7 +641,7 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/detailed_role.html b/src/adonisjs/public/themes/jacinto/detailed_role.html
index 8fd1d0f8d..db32e043c 100644
--- a/src/adonisjs/public/themes/jacinto/detailed_role.html
+++ b/src/adonisjs/public/themes/jacinto/detailed_role.html
@@ -569,6 +569,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/exam.html b/src/adonisjs/public/themes/jacinto/exam.html
index 6bca152c2..8945d8edd 100644
--- a/src/adonisjs/public/themes/jacinto/exam.html
+++ b/src/adonisjs/public/themes/jacinto/exam.html
@@ -664,6 +664,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/exam_wide.html b/src/adonisjs/public/themes/jacinto/exam_wide.html
index c201f465d..3a9b3cf43 100644
--- a/src/adonisjs/public/themes/jacinto/exam_wide.html
+++ b/src/adonisjs/public/themes/jacinto/exam_wide.html
@@ -90,6 +90,6 @@
    r="25.265163"
    inkscape:label="#path38" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/information.html b/src/adonisjs/public/themes/jacinto/information.html
index d1cf5b17b..635f43d70 100644
--- a/src/adonisjs/public/themes/jacinto/information.html
+++ b/src/adonisjs/public/themes/jacinto/information.html
@@ -676,6 +676,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/information_exam.html b/src/adonisjs/public/themes/jacinto/information_exam.html
index 6f4475e33..ec53942e6 100644
--- a/src/adonisjs/public/themes/jacinto/information_exam.html
+++ b/src/adonisjs/public/themes/jacinto/information_exam.html
@@ -683,6 +683,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/input.html b/src/adonisjs/public/themes/jacinto/input.html
index dbde2e756..bfd216bd2 100644
--- a/src/adonisjs/public/themes/jacinto/input.html
+++ b/src/adonisjs/public/themes/jacinto/input.html
@@ -583,6 +583,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/notice.html b/src/adonisjs/public/themes/jacinto/notice.html
index bc0dcf710..96374078a 100644
--- a/src/adonisjs/public/themes/jacinto/notice.html
+++ b/src/adonisjs/public/themes/jacinto/notice.html
@@ -91,12 +91,12 @@
    r="25.265163"
    inkscape:label="#path38" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
   </foreignObject>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="button-return"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="button-return"></dcc-button>
   </foreignObject>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="button-return-label"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="button-return-label"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/notice_exam_zoom.html b/src/adonisjs/public/themes/jacinto/notice_exam_zoom.html
index 141ad6ddc..a9b45f659 100644
--- a/src/adonisjs/public/themes/jacinto/notice_exam_zoom.html
+++ b/src/adonisjs/public/themes/jacinto/notice_exam_zoom.html
@@ -98,12 +98,12 @@
    r="25.265163"
    inkscape:label="#path38" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
   </foreignObject>
   <foreignObject>
-  <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="button-return"></dcc-button>
+  <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="button-return"></dcc-button>
   </foreignObject>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="button-return-label"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="button-return-label"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/notice_wide.html b/src/adonisjs/public/themes/jacinto/notice_wide.html
index 6f00d9ef2..3f49a84b6 100644
--- a/src/adonisjs/public/themes/jacinto/notice_wide.html
+++ b/src/adonisjs/public/themes/jacinto/notice_wide.html
@@ -90,12 +90,12 @@
    r="25.265163"
    inkscape:label="#path38" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="close-button"></dcc-button>
   </foreignObject>
   <foreignObject>
-  <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="button-return"></dcc-button>
+  <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="button-return"></dcc-button>
   </foreignObject>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="button-return-label"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="button-return-label"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/old/detailed.html b/src/adonisjs/public/themes/jacinto/old/detailed.html
index 1637d1511..6bd6ee236 100644
--- a/src/adonisjs/public/themes/jacinto/old/detailed.html
+++ b/src/adonisjs/public/themes/jacinto/old/detailed.html
@@ -214,7 +214,7 @@
        id="Path_320" />
   </g>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-arrow"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-arrow"></dcc-button>
   </foreignObject>
   <text
      style="font-size:20px;font-family:Tahoma, Geneva, sans-serif;fill:#ffffff"
diff --git a/src/adonisjs/public/themes/jacinto/old/information.html b/src/adonisjs/public/themes/jacinto/old/information.html
index be812f72a..0ff56becd 100644
--- a/src/adonisjs/public/themes/jacinto/old/information.html
+++ b/src/adonisjs/public/themes/jacinto/old/information.html
@@ -215,7 +215,7 @@
        id="Path_320" />
   </g>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-arrow"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-arrow"></dcc-button>
   </foreignObject>
   <g
      style="fill:none;stroke:#ffffff"
diff --git a/src/adonisjs/public/themes/jacinto/old/input.html b/src/adonisjs/public/themes/jacinto/old/input.html
index 55fbcdef5..3cc3254de 100644
--- a/src/adonisjs/public/themes/jacinto/old/input.html
+++ b/src/adonisjs/public/themes/jacinto/old/input.html
@@ -216,7 +216,7 @@
        id="Path_320" />
   </g>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-arrow"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-arrow"></dcc-button>
   </foreignObject>
   <g
      style="fill:#ffffff;stroke:#707070"
diff --git a/src/adonisjs/public/themes/jacinto/old/note.html b/src/adonisjs/public/themes/jacinto/old/note.html
index 59a6f10a4..39d867774 100644
--- a/src/adonisjs/public/themes/jacinto/old/note.html
+++ b/src/adonisjs/public/themes/jacinto/old/note.html
@@ -151,7 +151,7 @@
         class="cls-6"/>
   </g>
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="close-window"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="close-window"></dcc-button>
   </foreignObject>
 </svg>
 </div>
\ No newline at end of file
diff --git a/src/adonisjs/public/themes/jacinto/presentation_3.html b/src/adonisjs/public/themes/jacinto/presentation_3.html
index 0a4603119..3fcb4711a 100644
--- a/src/adonisjs/public/themes/jacinto/presentation_3.html
+++ b/src/adonisjs/public/themes/jacinto/presentation_3.html
@@ -861,6 +861,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/jacinto/presentation_4.html b/src/adonisjs/public/themes/jacinto/presentation_4.html
index 0f182aba0..b17116e0f 100644
--- a/src/adonisjs/public/themes/jacinto/presentation_4.html
+++ b/src/adonisjs/public/themes/jacinto/presentation_4.html
@@ -958,6 +958,6 @@
    cy="186.4236"
    r="25.741863" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/minimal/note.html b/src/adonisjs/public/themes/minimal/note.html
index 521031651..4838af380 100644
--- a/src/adonisjs/public/themes/minimal/note.html
+++ b/src/adonisjs/public/themes/minimal/note.html
@@ -1,6 +1,6 @@
 <div class="styn-note">
    <div class="styn-control-button">
-      <dcc-button topic="knot/</navigate" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
+      <dcc-button topic="knot/navigate/<" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
    </div>
 
    <div class="styt-pul-main">{knot}</div>
diff --git a/src/adonisjs/public/themes/plain/local/note.js b/src/adonisjs/public/themes/plain/local/note.js
index 33ea1be1c..f1ce15eb0 100644
--- a/src/adonisjs/public/themes/plain/local/note.js
+++ b/src/adonisjs/public/themes/plain/local/note.js
@@ -2,7 +2,7 @@
   const localTheme = `
 <div class="styn-note">
    <div class="styn-control-button">
-      <dcc-button topic="knot/</navigate" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
+      <dcc-button topic="knot/navigate/<" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
    </div>
 
    <div class="styt-pul-main">{knot}</div>
diff --git a/src/adonisjs/public/themes/simple-svg/detailed.html b/src/adonisjs/public/themes/simple-svg/detailed.html
index f3b7b84b2..a545c474e 100644
--- a/src/adonisjs/public/themes/simple-svg/detailed.html
+++ b/src/adonisjs/public/themes/simple-svg/detailed.html
@@ -539,6 +539,6 @@
    r="25.741863"
    visibility="hidden" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/simple-svg/exam.html b/src/adonisjs/public/themes/simple-svg/exam.html
index a1670b89d..8c8f26961 100644
--- a/src/adonisjs/public/themes/simple-svg/exam.html
+++ b/src/adonisjs/public/themes/simple-svg/exam.html
@@ -666,6 +666,6 @@
    r="25.741863"
    visibility="hidden" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/simple-svg/input.html b/src/adonisjs/public/themes/simple-svg/input.html
index 147d28a0b..a73648701 100644
--- a/src/adonisjs/public/themes/simple-svg/input.html
+++ b/src/adonisjs/public/themes/simple-svg/input.html
@@ -586,6 +586,6 @@
    r="25.741863"
    visibility="hidden" />
   <foreignObject>
-     <dcc-button topic="knot/</navigate" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
+     <dcc-button topic="knot/navigate/<" label="Previous Knot" xstyle="out-image" location="back-button"></dcc-button>
   </foreignObject>
 </svg>
diff --git a/src/adonisjs/public/themes/simple/local/note.js b/src/adonisjs/public/themes/simple/local/note.js
index 33ea1be1c..f1ce15eb0 100644
--- a/src/adonisjs/public/themes/simple/local/note.js
+++ b/src/adonisjs/public/themes/simple/local/note.js
@@ -2,7 +2,7 @@
   const localTheme = `
 <div class="styn-note">
    <div class="styn-control-button">
-      <dcc-button topic="knot/</navigate" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
+      <dcc-button topic="knot/navigate/<" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
    </div>
 
    <div class="styt-pul-main">{knot}</div>
diff --git a/src/adonisjs/public/themes/simple/note.html b/src/adonisjs/public/themes/simple/note.html
index 725d15ebb..e3366fdee 100644
--- a/src/adonisjs/public/themes/simple/note.html
+++ b/src/adonisjs/public/themes/simple/note.html
@@ -10,7 +10,7 @@
          </dcc-styler>
       </div>
       <div class="styt-button-frame">
-         <dcc-button xstyle="out" location="#in" topic="knot/</navigate" label="Return"></dcc-button>
+         <dcc-button xstyle="out" location="#in" topic="knot/navigate/<" label="Return"></dcc-button>
       </div>
    </div>
 </div>
diff --git a/src/adonisjs/public/themes/simple/note_references.html b/src/adonisjs/public/themes/simple/note_references.html
index afad77caa..cb25a0ea5 100644
--- a/src/adonisjs/public/themes/simple/note_references.html
+++ b/src/adonisjs/public/themes/simple/note_references.html
@@ -10,7 +10,7 @@
          </dcc-styler>
       </div>
       <div class="styt-button-frame">
-         <dcc-button xstyle="out" location="#in" topic="knot/</navigate" label="Return"></dcc-button>
+         <dcc-button xstyle="out" location="#in" topic="knot/navigate/<" label="Return"></dcc-button>
       </div>
    </div>
 </div>
diff --git a/src/adonisjs/public/themes/zombie/local/note.js b/src/adonisjs/public/themes/zombie/local/note.js
index 33ea1be1c..f1ce15eb0 100644
--- a/src/adonisjs/public/themes/zombie/local/note.js
+++ b/src/adonisjs/public/themes/zombie/local/note.js
@@ -2,7 +2,7 @@
   const localTheme = `
 <div class="styn-note">
    <div class="styn-control-button">
-      <dcc-button topic="knot/</navigate" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
+      <dcc-button topic="knot/navigate/<" label="Previous Knot" image="../themes/minimal/images/icon-back.svg"></dcc-button>
    </div>
 
    <div class="styt-pul-main">{knot}</div>
diff --git a/src/adonisjs/public/themes/zombie/note.html b/src/adonisjs/public/themes/zombie/note.html
index 1eaf50904..7b7a77ad2 100644
--- a/src/adonisjs/public/themes/zombie/note.html
+++ b/src/adonisjs/public/themes/zombie/note.html
@@ -1,6 +1,6 @@
 <div class="styn-note">
    <div class="styn-control-button">
-      <dcc-button topic="knot/</navigate" label="Previous Knot" image="../../themes/minimal/images/icon-back.svg"></dcc-button>
+      <dcc-button topic="knot/navigate/<" label="Previous Knot" image="../../themes/minimal/images/icon-back.svg"></dcc-button>
    </div>
 
    <div class="styt-pul-main">{knot}</div>
diff --git a/src/adonisjs/public/translator/playground/js/author-versum.js b/src/adonisjs/public/translator/playground/js/author-versum.js
index e0388d62c..7f24c0962 100644
--- a/src/adonisjs/public/translator/playground/js/author-versum.js
+++ b/src/adonisjs/public/translator/playground/js/author-versum.js
@@ -16,7 +16,7 @@ class AuthorVersumManager {
     this.updateVisibility = this.updateVisibility.bind(this)
 
     MessageBus.i.subscribe('control/translate/example', this.translate)
-    MessageBus.i.subscribe('var/output/changed', this.updateVisibility)
+    MessageBus.i.subscribe('input/changed/output', this.updateVisibility)
   }
 
   async translate (topic, message) {
diff --git a/src/adonisjs/public/translator/translator.js b/src/adonisjs/public/translator/translator.js
index b7d38e878..4f799ee09 100644
--- a/src/adonisjs/public/translator/translator.js
+++ b/src/adonisjs/public/translator/translator.js
@@ -425,7 +425,7 @@ class Translator {
       // <TODO> can be interesting this link in the future
       // compiled[c].input = this.findContext(knotSet, knotId, compiled[c].input);
       else if (compiled[c].type == 'option' ||
-                  compiled[c].type == 'divert') {
+               compiled[c].type == 'divert') {
         compiled[c].contextTarget =
                this._findTarget(knotSet, knotId, compiled[c].target)
       } else if (compiled[c].type == 'text-block')
@@ -654,41 +654,7 @@ class Translator {
      }
     }
 
-    // seventh cycle - aggregates options
-    let optionGroup = null
-    let subtype = null
-    for (let c = 1; c < compiled.length; c++) {
-      const pr = (c > 1 && compiled[c - 1].type == 'linefeed') ? c - 2 : c - 1
-      if (compiled[c].type == 'option') {
-        let stype = compiled[c].subtype
-        if (compiled[pr].type == 'option' && compiled[c].subtype == subtype) {
-          optionGroup = this._initializeObject(
-            {
-              type: 'input',
-              subtype: 'choice',
-              exclusive: true,
-              shuffle: (subtype == '+'),
-              options: {}
-            }, compiled[pr]._source)
-          this._transferOption(optionGroup.options, compiled[pr])
-          compiled[pr] = optionGroup
-        }
-        if (optionGroup != null && compiled[c].subtype == subtype) {
-          this._transferOption(optionGroup.options, compiled[c])
-          optionGroup._source += '\n' + compiled[c]._source
-          const shift = c - pr
-          compiled.splice(c - shift + 1, shift)
-          c -= shift
-        } else
-          optionGroup = null
-        subtype = stype
-      } else if (compiled[c].type != 'linefeed') {
-        optionGroup = null
-      }
-      compiled[c].seq = c + 1
-    }
-
-    // eighth cycle - computes subordinate elements
+    // seventh cycle - computes subordinate elements
     for (let c = 0; c < compiled.length; c++) {
       const pr = (c > 1 && compiled[c - 1].type == 'linefeed') ? c - 2 : c - 1
       // later blockquotes and subordinates (excluding knot subordinates)
@@ -727,14 +693,6 @@ class Translator {
                        (compiled[c].subordinate || compiled[c].blockquote)) {
           compiled[pr][Translator.element[compiled[pr].type].subtext] =
                      compiled[c].content
-          /*
-               if (compiled[pr][Translator.element[compiled[pr].type].subtext] == null)
-                  compiled[pr][Translator.element[compiled[pr].type].subtext] =
-                     compiled[c].content;
-               else
-                  compiled[pr][Translator.element[compiled[pr].type].subtext] += "\n" +
-                     compiled[c].content;
-               */
           merge = true
         }
         if (merge) {
@@ -743,19 +701,71 @@ class Translator {
           compiled[pr].mergeLine =
                   Translator.element[compiled[c].type] &&
                   Translator.isLine.includes(compiled[c].type)
-          /*
-               compiled[pr].mergeLine =
-                  (Translator.element[compiled[c].type] &&
-                   Translator.element[compiled[c].type].line !== undefined)
-                     ? Translator.element[compiled[c].type].line : false;
-               */
           const shift = c - pr
           compiled.splice(c - shift + 1, shift)
           c -= shift
         }
       }
-      // previous blockquotes for inputs
-      else if (compiled[c].type == 'input' && compiled[pr].blockquote) {
+      // manages elements subordinated to the knot
+      else if ((c == 0 || (c == 1 && compiled[c - 1].type == 'linefeed')) &&
+                  compiled[c].subordinate && compiled[c].type == 'image') {
+        // console.log('=== image back')
+        unity.background = {
+          alternative: compiled[c].alternative,
+          path: compiled[c].path
+        }
+        if (compiled[c].title) { unity.background.title = compiled[c].title }
+        compiled[c].render = false
+      }
+      if (c >= 0) { compiled[c].seq = c + 1 }
+    }
+
+    // eighth cycle - aggregates options
+    let optionGroup = null
+    let subtype = null
+    for (let c = 1; c < compiled.length; c++) {
+      const pr = (c > 1 && compiled[c - 1].type == 'linefeed') ? c - 2 : c - 1
+      if (compiled[c].type == 'option') {
+        console.log('=== previous')
+        console.log(compiled[pr])
+        let stype = compiled[c].subtype
+        if  (compiled[pr].type == 'input' && compiled[pr].subtype &&
+             compiled[pr].subtype == 'choice' && compiled[pr].options == null) {
+          subtype = stype
+          optionGroup = compiled[pr]
+          optionGroup.options = {}
+        } else if (compiled[pr].type == 'option' &&
+                   compiled[c].subtype == subtype) {
+          optionGroup = this._initializeObject(
+            {
+              type: 'input',
+              subtype: 'choice',
+              exclusive: true,
+              shuffle: (subtype == '+'),
+              options: {}
+            }, compiled[pr]._source)
+          this._transferOption(optionGroup.options, compiled[pr])
+          compiled[pr] = optionGroup
+        }
+        if (optionGroup != null && compiled[c].subtype == subtype) {
+          this._transferOption(optionGroup.options, compiled[c])
+          optionGroup._source += '\n' + compiled[c]._source
+          const shift = c - pr
+          compiled.splice(c - shift + 1, shift)
+          c -= shift
+        } else
+          optionGroup = null
+        subtype = stype
+      } else if (compiled[c].type != 'linefeed' ||
+                 compiled[c].content.length > 1)
+        optionGroup = null
+      compiled[c].seq = c + 1
+    }
+
+    // ninth cycle - previous blockquotes for inputs
+    for (let c = 0; c < compiled.length; c++) {
+      const pr = (c > 1 && compiled[c - 1].type == 'linefeed') ? c - 2 : c - 1
+      if (compiled[c].type == 'input' && compiled[pr].blockquote) {
         let content = compiled[pr].content
         let source = compiled[pr]._source
 
@@ -773,21 +783,10 @@ class Translator {
         compiled.splice(pr, shift)
         c -= shift
       }
-      // manages elements subordinated to the knot
-      else if ((c == 0 || (c == 1 && compiled[c - 1].type == 'linefeed')) &&
-                  compiled[c].subordinate && compiled[c].type == 'image') {
-        // console.log('=== image back')
-        unity.background = {
-          alternative: compiled[c].alternative,
-          path: compiled[c].path
-        }
-        if (compiled[c].title) { unity.background.title = compiled[c].title }
-        compiled[c].render = false
-      }
       if (c >= 0) { compiled[c].seq = c + 1 }
     }
 
-    // ninth cycle - joins script sentences
+    // tenth cycle - joins script sentences
     // <TODO> quite similar to text-block (join?)
     let script
     let scriptSeq
@@ -828,7 +827,7 @@ class Translator {
 
     this._compileMergeLinefeeds(compiled)
 
-    // tenth cycle - process and hide formal comments
+    // eleventh cycle - process and hide formal comments
     let inFormal = false
     let lastContext = null
     let lastId = null
@@ -1864,7 +1863,12 @@ class Translator {
   _transformNavigationMessage (target) {
     let message
     const lower = target.toLowerCase()
-    if (Translator.reservedNavigation.includes(lower)) { message = Translator.navigationMap[lower] } else if (lower.startsWith('variable.')) { message = 'variable/' + target.substring(9) + '/navigate' } else { message = 'knot/' + target + '/navigate' }
+    if (Translator.reservedNavigation.includes(lower)) {
+      message = Translator.navigationMap[lower] }
+    else if (lower.startsWith('variable.'))
+      message = 'knot/navigate/=/' + target.substring(9).replace(/\./g, '/')
+    else
+      message = 'knot/navigate/' + target.replace(/\./g, '/')
     return message
   }
 
@@ -2232,7 +2236,10 @@ class Translator {
     // <TODO> provisory - weak strategy (only one per case)
     let answer = ''
     if (this._playerInputShow || this.authoringRender) {
-      if (this._playerInputShow == '#answer' || this.authoringRender) { answer = " answer='" + obj.value + "'" } else { answer = " player='" + this._playerInputShow + "'" }
+      if (this._playerInputShow == '#answer' || this.authoringRender)
+        { answer = " answer='" + obj.value + "'" }
+      else
+        { answer = " player='" + this._playerInputShow + "'" }
     }
 
     let extraAttr = ''
@@ -2266,7 +2273,10 @@ class Translator {
       // indicates how related selects will behave
       this._playerInputShow = null
       if (obj.show) {
-        if (obj.show == 'answer') { this._playerInputShow = '#answer' } else { this._playerInputShow = obj.variable }
+        if (obj.show == 'answer')
+          this._playerInputShow = '#answer'
+        else
+          this._playerInputShow = obj.variable
       }
     }
 
@@ -2681,11 +2691,11 @@ class Translator {
     'knot.previous', 'knot.next',
     'flow.next', 'session.close']
   Translator.navigationMap = {
-    'case.next': 'case/>/navigate',
-    'knot.start': 'knot/<</navigate',
-    'knot.previous': 'knot/</navigate',
-    'knot.next': 'knot/>/navigate',
-    'flow.next': 'flow/>/navigate',
+    'case.next': 'case/navigate/>',
+    'knot.start': 'knot/navigate/<<',
+    'knot.previous': 'knot/navigate/<',
+    'knot.next': 'knot/navigate/>',
+    'flow.next': 'flow/navigate/>',
     'session.close': 'session/close'
   }