an issue you raised against XML Schema 1.0 (now bug 2833, formerly RQ-33 and LC-151)

Dear Jane,

Long, long ago -- longer ago than I care to think -- you raised a
number of issues against XML Schema 1.0 on behalf of those
involved in developing MPEG-7.  One of them has recently
resurfaced and been addressed by the W3C XML Schema Working
Group; this note is to let you know what happened.

Among the issues you raised was an issue recorded in the Working
Group's list of last-call comments as LC-151, requesting 'typed
references'.  The original form of your comments was, I believe,
a document on DSTC's web server, which is no longer accessible.
So the best summary I have been able to find is the one offered
in the XML Schema WG's last-call issues list:

http://www.w3.org/XML/Group/xmlschema-current/lcissues.html#typed-refs

When XML Schema 1.0 was published as a Candidate Recommendation,
we resolved this issue by (a) dividing into two distinct
proposals, (b) noting that one of them was supported, and (c)
reserving the second for later action, possibly in the context of
a future version of XML Schema.  The two proposals can be
summarized as

1:  constrain references to elements bearing particular names
2:  constrain references to elements having particular
      simple or complex types (regardless of the element name)

For further details, I cannot improve upon Frank Olken's email to
you at the time

http://lists.w3.org/Archives/Public/www-xml-schema-comments/ 
2000OctDec/0179.html

In due course, item 2 (the remaining part of the issue) was
entered into the candidate requirements for XML Schema 1.1 as an
'opportunistic desideratum' (meaning if it turned out to be easy
to do, we would do it, but that we did not plan to expend much
effort on it).

http://www.w3.org/XML/Group/2002/07/xmlschema-1.1-current-reqs- 
list.html#keys-constraints
(member-only link -- I cannot find a public version of this
document)

And still later it was transferred into our current issue
tracking system as issue 2633:

http://www.w3.org/Bugs/Public/show_bug.cgi?id=2833

The Working Group recently considered this issue, in the context
of a re-examination of currently outstanding issues, and
concluded (again) that the important part of the issue you
originally raised is item 1, which is supported by XML Schema
1.0; accordingly, we determined to close the issue without
further action.

We are interested in your response to this decision, as the
originator of the issue we have been tracking.  If we have
misunderstood the requirement, or you are unsatisfied with the
final resolution of the issue for any reason, please let us know
by replying to this mail.  If you are content with the resolution
of the issue, again please let us know by replying to the mail.
If we do not hear from you on this topic, we will assume that
silence implies consent and that you are content with the
disposition of the question.

with best regards,

--Michael Sperberg-McQueen
   World Wide Web Consortium

Received on Tuesday, 1 May 2007 23:21:56 UTC