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[Bug 5023] Relationship between identity constraints and assertions

From: <bugzilla@wiggum.w3.org>
Date: Mon, 13 Apr 2009 01:41:02 +0000
To: www-xml-schema-comments@w3.org
Message-Id: <E1LtBAU-0005Ac-99@wiggum.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=5023





--- Comment #6 from Erik Wilde <dret@berkeley.edu>  2009-04-13 01:41:01 ---
this looks really useful, i think this will help readers quite a bit. thanks!

minor editorial remarks:

"XSD has three forms of constraint ..." -> "XSD has three forms of constraints
..."

"In version 1.0 of this specification, identity constraints used [XPath 1.0]
They now use [XPath 2.0]." -> "In version 1.0 of this specification, identity
constraints used [XPath 1.0]; they now use [XPath 2.0]."

in theory, one could point to schematron and point out that originally, XSD was
mostly about grammars, and that schematron was invented to be used as an
alternative for cases where grammar rules do not work very well. XSD 1.1
probably allows some schematron applications to be covered by XSD now, but
schematron's abstract patterns and phases still are language constructs which
do not readily map to any language feature of XSD. i realize that the spec may
not be the appropriate place for something like this, but it certainly would be
useful for people searching for some guidance and comparison. (treated a bit
more systematically, it also would be a perfect topic for a balisage paper...
;-)


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