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Transition from DTD to XML Schema specification
- From: "Michael Steidl (IPTC)" <mdirector@iptc.org>
- To: xml-dev@lists.xml.org
- Date: Tue, 05 Jun 2007 16:49:35 +0200
Hello Group:
More than 5 years ago my organisation, the IPTC (www.iptc.org), has
created first XML document specifications based on DTDs for the purpose of
exchanging news in a B2B environment. Now we want move the document
definitions to XML Schemas (to be precise: the "new" XML Schema replicates
the "old" DTD), and this drives us into a bad situation:
- for the XML Schema we define a default namespace.
- adopters of our document specification set up an XML database and load
the XML Schema for structure validation.
- then they receive XML documents which are still based on the DTD and
hence without a namespace.
- the XML DB rejects these XML instances as invalid - and actually this is
right.
What are best practices for such a sliding transition from DTD to XML
Schema validated documents and are there workarounds to allow the import
of both non-namespaced and namespaced XML instances. Our document
specifications are used worldwide and there is no way of defining a "day
X" from that on DTD based instances are abondoned and only XML Schema
based instances are allowed.
Thanks
Michael
==================================================
Sent by:
Michael Steidl
Managing Director of the IPTC <mdirector@iptc.org>
International Press Telecommunications Council
"Information Technology for News"
Visit us on the web at http://www.iptc.org
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