Document Asset Catalog and move it to Tech Preview

Signed-off-by: Alexandra Bucur <alexandra-nona.bucur@ing.com>

site/docs/services/omas/asset-catalog/get-asset-classifications.md

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+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+# Get Asset Classifications
+
+This is the ability to retrieve all classifications that exist on a specific asset.
+
+More examples can be found in the
+[sample collection](samples/collections/Asset-Catalog-endpoints.postman_collection.json)
+
+```
+GET {{base-url}}/servers/{{server-id}}/open-metadata/access-services/asset-catalog/users/{{user-id}}/supportedTypes
+```
+Path and request parameters:
+* `serverName` - unique identifier for requested server
+* `userId` - the unique identifier for the user
+* `assetGUID` - the unique identifier for the asset
+* `assetType` - the type of the asset
+* `classificationName` - the name of the classification
+
+Response:
+* `ClassificationsResponse` - the classification for the asset
+
+---8<-- "snippets/abbr.md"
+
+
+
+
+
+
+

site/docs/services/omas/asset-catalog/get-asset-context.md

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+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+# Get Asset Context
+
+Return the full context of an asset/glossary term based on its identifier. 
+The response contains the list of the connections assigned to the asset.
+
+More examples can be found in the
+[sample collection](samples/collections/Asset-Catalog-endpoints.postman_collection.json)
+
+```
+GET {{base-url}}/servers/{{server-id}}/open-metadata/access-services/asset-catalog/users/{{user-id}}/asset-context/{{asset-guid}}
+```
+Path and request parameters:
+* `serverName` - unique identifier for requested server.
+* `userId` - the unique identifier for the user
+* `assetGUID` - the global unique identifier of the asset
+* `assetType` - the type of the asset
+
+Response:
+* `AssetResponse` - list of properties used to narrow the search
+
+---8<-- "snippets/abbr.md"
+
+
+
+
+
+
+

site/docs/services/omas/asset-catalog/get-asset-details.md

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+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+# Get Asset Details
+
+Fetches asset's properties, relationships and classifications
+
+More examples can be found in the
+[sample collection](samples/collections/Asset-Catalog-endpoints.postman_collection.json)
+
+```
+GET {{base-url}}/servers/{{server-id}}/open-metadata/access-services/asset-catalog/users/{{user-id}}/asset-details/{{asset-guid}}
+```
+Path and request parameters:
+* `serverName` - unique identifier for requested server.
+* `userId` - the unique identifier for the user
+* `assetGUID` - the global unique identifier of the asset
+* `assetType` - the type of the asset
+
+Response:
+* `AssetCatalogResponse` - list of properties used to narrow the search
+
+---8<-- "snippets/abbr.md"
+
+
+
+
+
+
+

site/docs/services/omas/asset-catalog/get-asset-relationships.md

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+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+# Get Asset Relationships
+
+Fetches the relationships for a specific asset
+
+More examples can be found in the
+[sample collection](samples/collections/Asset-Catalog-endpoints.postman_collection.json)
+
+```
+GET {{base-url}}/servers/{{server-id}}/open-metadata/access-services/asset-catalog/users/{{user-id}}/asset-relationships/{{asset-guid}}?assetType={{asset-type}}&relationshipType={{relationship-type}}
+```
+Path and request parameters:
+* `serverName` - unique identifier for requested server
+* `userId` - the unique identifier for the user
+* `assetGUID` - the unique identifier for the asset
+* `assetType` - the type of the asset
+* `relationshipType` - the type of the relationship
+* `from` - offset
+* `pageSize` - limit the number of the assets returned
+
+Response:
+* `RelationshipListResponse` - list of relationships for the given asset
+
+---8<-- "snippets/abbr.md"
+
+
+
+
+
+
+

site/docs/services/omas/asset-catalog/get-asset-universe.md

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+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+# Get Asset Universe
+
+Fetches asset's header, classification, properties and relationships
+
+More examples can be found in the
+[sample collection](samples/collections/Asset-Catalog-endpoints.postman_collection.json)
+
+```
+GET {{base-url}}/servers/{{server-id}}/open-metadata/access-services/asset-catalog/users/{{user-id}}/asset-relationships/{{asset-guid}}?assetType={{asset-type}}&relationshipType={{relationship-type}}
+```
+Path and request parameters:
+* `serverName` - unique identifier for requested server
+* `userId` - the unique identifier for the user
+* `assetGUID` - the unique identifier for the asset
+* `assetType` - the type of the asset
+
+Response:
+* `AssetCatalogResponse` - the asset with its header and the list of associated classifications and relationship
+
+---8<-- "snippets/abbr.md"
+
+
+
+
+
+
+

site/docs/services/omas/asset-catalog/get-supported-types.md

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+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+# Get Supported Types
+
+Returns the list with supported types for search, including the sub-types supported
+
+More examples can be found in the
+[sample collection](samples/collections/Asset-Catalog-endpoints.postman_collection.json)
+
+```
+GET {{base-url}}/servers/{{server-id}}/open-metadata/access-services/asset-catalog/users/{{user-id}}/supportedTypes
+```
+Path and request parameters:
+* `serverName` - unique identifier for requested server
+* `userId` - the unique identifier for the user
+* `type` - the type
+
+Response:
+* `AssetCatalogSupportedTypes` - list of types and sub-types supported for search
+
+---8<-- "snippets/abbr.md"
+
+
+
+
+
+
+

site/docs/services/omas/asset-catalog/overview.md

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 <!-- SPDX-License-Identifier: CC-BY-4.0 -->
 <!-- Copyright Contributors to the Egeria project. -->
 
---8<-- "snippets/content-status/in-development.md"
+--8<-- "snippets/content-status/tech-preview.md"
 
 # Asset Catalog Open Metadata Access Service (OMAS)
 
@@ -21,47 +21,52 @@ to it. This includes:
 * assets
 
 The Asset Catalog REST API supports:
-
 * the retrieval of assets based on unique identifiers
 * the retrieval of asset's relationships and classifications
-* the retrieval of assets based on known classification or relationship
-* to query for related assets and to retrieve an asset neighborhood
+* to query for related assets
+* the retrieval of assets based on their type
 
 The module structure for the Asset Catalog OMAS is as follows:
-
 * [asset-catalog-client](asset-catalog-client) supports the client library.
 * [asset-catalog-api](asset-catalog-api) supports the common Java classes that are used both by the client and the server.
 * [asset-catalog-server](asset-catalog-server) supports the server side implementation of the access service.
- This includes the
-  * interaction with the [administration services](/services/admin-services/overview) for
-    registration, configuration, initialization and termination of the access service.
-  * interaction with the [repository services](/services/omrs) to work with open metadata from the
-    [cohort](/concepts/cohort-member).
-  * support for the access service's API and its related event management.
-* [asset-catalog-spring](asset-catalog-spring) supports the REST API using the [Spring](/guides/contributor/runtime/#spring) libraries.
+  This includes the
+    * interaction with the [administration services](../../admin-services) for
+      registration, configuration, initialization and termination of the access service.
+    * interaction with the [repository services](../../repository-services) to work with open metadata from the
+      [cohort](https://egeria-project.org/concepts/cohort-member).
+    * support for the access service's API and its related event management.
+* [asset-catalog-spring](asset-catalog-spring) supports the REST API using the [Spring](../../../developer-resources/Spring.md) libraries.
+* [asset-catalog-topic-connector](asset-catalog-topic-connector) supports asynchronous messaging through a connector
+  and connector provider class
+
+## Using the Asset Catalog OMAS
+
+Below is the list of tasks supported by Asset Catalog OMAS.
+
+#### [Get Asset Classifications](get-asset-classifications.md)
+#### [Get Asset Context](get-asset-context.md)
+#### [Get Asset Details](get-asset-details.md)
+#### [Get Asset Relationships](get-asset-relationships.md)
+#### [Get Asset Universe](get-asset-universe.md)
+#### [Get Supported Types](get-supported-types.md)
+#### [Search](search.md)
+
 
 
-###Search solution
+## Search Solution
 The search will return Assets, Glossary Terms and Schema Elements that match the search criteria.
-As the asset search is to be performed against on one or more repositories a search engine will be used. 
+As the asset search is to be performed against on one or more repositories a search engine will be used.
 The search will be performed using the existing properties of the asset, glossary terms and/or schema elements.
 Indexing will be performed by the Asset Catalog OMAS according to supported zones.
 The search result will contain: guid, name (name or displayName), description, qualifiedName, classifications, zoneMembership (the basic properties of the element).
 
 In order to get the full context of the element, a second call is performed.
 At this step, the specific relationships are traverse for getting the connection to the asset and to get the schema type that is behind the given asset.
-This call is using the asset global identifier and the asset type. 
+This call is using the asset global identifier and the asset type.
 
 
 ![Figure 1: Search](egeria-asset-search.png)
-> Figure 1:Integration of search engine
-
-###Other Services
-Asset Catalog OMAS provides services to fetch the asset 
-* classifications
-* relationships
-* specific entities that connects two assets
-* relationships between two known entities 
-* related assets 
+> Figure 1: Integration of search engine
 
 --8<-- "snippets/abbr.md"