Mark,
I understand perfectly your point. I have
been tasked with producing a set of potential solutions for code list
extensibility for the committee to review. Each solution must allow users of
a set of schemas to extend and restrict a code list without modifying the
underlying schemas. It is presumed that these underlying schemas are maintained
by a standards group, and the users of the schema are in a commercial trading
group that wants to implement its own usage agreements without requiring change
to the standard.
The set of solution methods that have been
proposed in this and other forums include:
- Substitution
Groups
- Redefine
- anyURI
Plus Lax processing
- Xsi:type
override
Each has its own benefits and costs. When
I complete the working white paper, we can discuss which if any are the desired
solution set.
Marty
From:
MCRAWFORD@lmi.org [mailto:MCRAWFORD@lmi.org]
Sent: Friday, May 06, 2005 9:30 AM
To: burnsmarty@comcast.net;
xml-dev@lists.xml.org
Subject: Re: [xml-dev] Proper way
to use redefine in an hierarchichal set of schemas
Hi marty,
Fyi, xsd:redefine use is prohibited by UBL and UN/CEFACT
Mark R. Crawford
Senior Research Fellow - LMI XML Lead
W3C Advisory Committee, OASIS, RosettaNet Representative
Vice Chair - OASIS UBL TC & Chair Naming and Design Rules Subcommittee
Chair - UN/CEFACT XML Syntax Working Group
Editor - UN/CEFACT Core Components
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