The following is a list of major differences between 1.0 and 2.0 of ebXML Registry specifications. Note that version 2.0 is not backward compatible with 1.0. Backward compatibility is a goal in future versions.
Filter query syntax/semantics has been simplified.
Extramural association: Defines semantics of creating associations between two objects where one or both objects are not owned by the party that is creating the association.
RIM changes: Simplifications to make RIM metadata to be lighter weight.
UpdateObjectsRequest: Separates update requests from submit requests.
I18N changes: Now allows the same attribute to have multiple local and character set specific values.
External Classification support: Allows a classification to be defined when the taxonomy resides outside the registry.
ClassificationScheme: Added a new infomodel class to represent a taxonomy.
SOAP interface: Added normative SOAP binding (in WSDL form) to the abstract interface for the registry
Registration of Web Services: Added the ability to publish/discover Web Services, their service bindings and their specifications.
Security enhancements to clarify use of XML Digital signatures in registry Requests and Responses.
Defined registry user roles more concretely (Registration Authority, Registry Guest, etc.)