XInclude 1.1 attempts to address a couple of new use cases.
When I first wrote about the efforts of the DocBook TC to address some transclusion problems, Elliotte was the first to point out that we were doing it wrong.
There was subsequent discussion and finally some experimentation. The practical upshot of which is this: with a couple of small amendments, XInclude could be used to address DocBook's transclusion problems.
Last week, the XML Core WG posted a note describing XInclude 1.1 Requirements and Use Cases outlining how this might be achieved.
Comments most welcome, as always.