Complain over the last years is that RM XML Schema files are not usable other than validating COMPOSITION, VERSION, etc. This is due to (local) type declaration in the some of the schema:
<xs:element name="composition" type="COMPOSITION"/>
The wish is to have RM types defined into reusable schema files, while maintaining current functionality of current schema (validating XML messages). This will allow openEHR implementers to use schema also generate code, and at the same time will open the possibility to add other missing RM classes to ITS-XML repo.