I am glad to see RDDL being used by W3C and OASIS for namespace documents.
http://del.icio.us/mitrepauld/rddl+xmlnsWhat if one of these namespace documents (or any RDDL document,
perhaps not associated with a namespace) wanted to point to a WADL or
OpenSearch description?
What rddl:nature or xlink:role should be used?
<q cite="
http://www.rddl.org/natures/">
When a referenced resource is XML and its nature can be inferred from
the namespace URI of the root element, this namespace URI is the
nature of the referenced resource.
</q>
So, WADL would use
rddl:nature="
http://research.sun.com/wadl"
OpenSearch 1.1 would use
rddl:nature="
http://a9.com/-/spec/opensearch/1.1/"
http://www.opensearch.org/Specifications/OpenSearch/1.1Comments?
Paul