Moving towards "strict" xml:id checking

The proposal I was trying to make when we ran out of time is the following:

  It is an error for an ID value to be specified more than once.
  A processor which detects this error MUST report it. Processors
  SHOULD attempt to detect all such errors.

That's in "intent-ese" rather than "spec-ese". And we also perhaps
need a note somewhere explaining that processors which do not read all
of the available declarations will not be able to detect every
possible error of this sort.

                                        Be seeing you,
                                          norm

-- 
Norman.Walsh@Sun.COM / XML Standards Architect / Sun Microsystems, Inc.
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