XRI Resolution 2.0 specification
The Yadis Resource Descriptor document is an Extensible Resource Descriptor (XRD) document, as (we expect will be) specified in the XRI Resolution 2.0 specification.
The current working draft of this specification is at: www.oasis-open.org/committees/download.php/17293/xri-resolution-v2.0-wd-10.pdf
We do not expect that there will be changes in that specification that will affect the Yadis Specification. If there are, our preference will be to accomodate those changes in the Yadis Specification.
If OASIS should decide not to adopt that specification, we intend to adopt as our own the schema in working draft 10 or a later working or committee draft.