Hans, Note RELAX NG answers below:
> My first question is rng-related. I know rng supports id/idref, but I'm
> not sure what it takes to invoke that. For example, the activity_id
> attribute of administrative_task should be an idref to the activity
> element with that id.
RELAX NG's implementati
By the way, rather than simple XML comments, you can embed foreign elements
in the RELAX NG schema for documentation purposes, such as the simple
element provided in the compatibility spec [1] and
expressed with ## in the compact syntax, or with XHTML or DocBook tags.
During validation (simplific
