RDDL

Nice comment about Use RDDL instead of XML Schema at the Namespace URI?
Posting to W3C Web Services Addressing Working Group List
Proposal: "Place a RDDL document at each of the namespace URIs defined by WS-Addressing. Provide a 'latest schema' link as well as dated links to the schema. State in the document that the resources (schemas) at the dated links are immutable, the list of dated schemas may grow to incorporate fixes, and the latest schema link will always point to the latest." Justification: "One advantage of RDDL is that it would enable one to discover, through the namespace URI, a number of schemas for the namespace. This is especially interesting when errata are taken into account. The WS-I BP promulgated some fixes to the WSDL 1.1 schema, but since it is also desirable to have a stable document at the namespace URI, it published alternative dated versions with various fixes in them, and pointed to those dated versions from the spec. It might have been simpler and more discoverable to find all the related (dated) schemas through a RDDL document at the namespace URI."