Change transformation framework to use ModeShape structure via CND

[jpav]

No description provided.

[elvisisking]

Here's a first cut at a CND:

<tx = 'http://www.polyglotter.org/transform/1.0'>
<mm = 'http://modeshape.org/modeshape-modeler/1.0'>

[tx:descriptor]
  - tx:version (string) = "1.0.0" autocreated
  - tx:description (string)
  - tx:modifiable (boolean) = 'true' autocreated
  - tx:requiredCount (long) = '1' autocreated
  - tx:unbounded (boolean) = 'false' autocreated
  - tx:outputType (string) mandatory

[tx:model]
  - tx:modelType (string) mandatory < 'SOURCE', 'TARGET', 'SOURCE_TARGET'
  - tx:modelPath (string) mandatory

[tx:input]
  - tx:descriptorRef (reference) = 'tx:descriptor' mandatory
  - tx:modelObjectPath (string)
  - tx:value (string)

[tx:operation]
  - tx:descriptorRef (reference) = 'tx:descriptor' mandatory
  - tx:script (string) mandatory
  + tx:inputs (tx:input) = tx:input copy sns

[tx:transformation] > mm:model mixin
  + tx:models (tx:model) = tx:model copy
  + tx:operations (tx:operation) = tx:operation copy sns

[elvisisking]

Here is next version of transform.cnd incorporating the changes we discussed @jpav:

<tx = 'http://www.polyglotter.org/transform/1.0'>
<mm = 'http://modeshape.org/modeshape-modeler/1.0'>

/*
 * An operation input. The node name is the descriptor ID that this input uses.
 * 
 * Properties:
 *   path - 'true' if the 'value' property represents a node path
 *   value - the input value (usually a path to a model object but can be a literal) 
 */
[tx:input]
  - tx:path (boolean) = 'true' autocreated
  - tx:value (string) mandatory

/*
 * An operation included in a transformation. The node name is the operation output descriptor ID. 
 * 
 * Properties:
 *   descriptorId - the descriptor ID for the output value of the operation
 *   text - the DSL representing the operation
 * 
 * Children: the operation inputs named by there descriptor ID
 */
[tx:operation]
  - tx:descriptorId (string) mandatory
  - tx:text (string) mandatory
  + * (tx:input) = tx:input copy sns

/*
 * A transformation model.
 * 
 * Properties:
 *   sources - multi-valued list of source model paths
 *   targets - multi-valued list of target model paths
 * 
 * Children: the operations named by there descriptor ID
 */
[tx:transformation] > mm:model mixin
  - tx:sources (path) multiple
  - tx:targets (path) multiple
  + * (tx:operation) = tx:operation copy sns

[jpav]

Looks good.