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xsd:appinfo

From: Ralph R. Swick <swick@w3.org>
Date: Thu, 11 May 2000 16:23:33 -0400
Message-Id: <3.0.5.32.20000511162333.033d6a10@127.0.0.1>
To: www-xml-schema-comments@w3.org
Cc: www-rdf-interest@w3.org
The xsd:appinfo schema component in the schema-for-schemas
http://www.w3.org/TR/2000/WD-xmlschema-1-20000407/#element-appinfo
appears to adequately address the request for a mechanism to
permit an XML Schema schema document to hold declarations for
mapping to other application data structures documented in
item 3.2 of http://www.w3.org/TR/1999/NOTE-schema-arch-19991007.

I thank the XML Schema WG for including this feature.  I also
commend the WG for illustrating one usage scenario in the
Schema for Datatype definitions
http://www.w3.org/TR/2000/WD-xmlschema-2-20000407/#schema

My enthusiasm is tempered, however, by the lack of any guidance
on how to discover the semantics of the two example elements
'has-facet' and 'has-property'.  Having constructed all this
wonderful machinery for extending the declarative power of an
XML Schema, the sole example of its use fails to lead the way
in applying that same machinery to the extension.  'has-facet'
and 'has-property' do not themselves have first-class names,
nor are they even clearly part of a namespace.  I encourage the
spec editors to lead by example in your application of appinfo.
Received on Thursday, 11 May 2000 16:24:48 GMT

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