ATS-892 / ATS-909: Add IPTC model to ATS zip (#399)

- tweak text to be consistent with T-Service

- note: for now a copy of files (sourced from Repo)
- we can look to remove &/or rationalise in the future (depending on how quickly ACS service packs are released etc)

models/README.md

@@ -1,5 +1,21 @@
 ## Additional Alfresco Models (Content Metadata)
 
-- IPTC Model
-  - https://github.com/Alfresco/alfresco-transform-core/tree/master/models
-  - https://iptc.org/standards/photo-metadata/iptc-standard/
+IPTC (Photo Metadata) Standard ( https://iptc.org/standards/photo-metadata/iptc-standard/ )
+ 
+Alfresco provides an IPTC content model that maps the IPTC photo metadata fields to an 
+Alfresco Content Model. 
+
+This IPTC content model used to be part of the Alfresco Media Management product. It is now 
+provided as part of the core open-source Alfresco Repository. Hence, it will be pre-configured 
+as part of future core Repository releases (eg. ACS 7.1.0 and related Alfresco Community release). 
+
+The latest ("master") source files can also be found here:
+
+- https://github.com/Alfresco/alfresco-community-repo/blob/master/repository/src/main/resources/alfresco/model/iptcModel.xml
+- https://github.com/Alfresco/alfresco-community-repo/tree/master/repository/src/main/resources/alfresco/messages (iptc-model*.properties)
+
+In the meantime, for convenience, a copy of the Alfresco IPTC content model (XML + message properties) 
+is also provided here. These files can be configured to deploy the model into earlier versions of 
+ACS (eg. 7.0.0) using static bootstrap mechanism.
+
+