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David Lee wrote: > Consider this supposedly equal document. > > ... > > It will fail your DTD validation. Ouch! Quite right David. I believe this shows that using DTDs as a mechanism to detect unused namespaces won't work. (I think this is the "false positives" that Rich was referring to) /Roger -----Original Message----- From: David [mailto:dlee@c...] Sent: Wednesday, September 22, 2010 10:40 AM To: xml-dev@l... Subject: Re: My report on experiments with unused namespaces This validation is of marginal use. Consider this supposedly equal document. <x:Root xmlns:x="http://www.used.org"> <x:child>true</x:child> </x:Root> It will fail your DTD validation. David A. Lee dlee@c... http://www.xmlsh.org On 9/22/2010 10:21 AM, Costello, Roger L. wrote: > David Carlisle suggested validating an XML document against a DTD as a mechanism for detecting unused namespaces. I tried it. It works well. > > I created this DTD: > > <!ELEMENT Root (child)> > <!ATTLIST Root > xmlns CDATA #FIXED 'http://www.used.org'> > > <!ELEMENT child (#PCDATA)> > <!ATTLIST child > xmlns CDATA #FIXED 'http://www.used.org'> > > > This XML document contains no unused namespaces: > > ----------------------------------- > <Root xmlns="http://www.used.org"> > > <child>true</child> > > </Root> > ----------------------------------- > > It validates fine. > > > Then I added an unused namespace: > > ----------------------------------- > <Root xmlns="http://www.used.org" > xmlns:foo="blah"> > > <child>true</child> > > </Root> > ----------------------------------- > > Validation fails. Good! Validation detected the unused namespace. > > > Conversely, this XML Schema does not detect the unused namespace: > > <schema xmlns="http://www.w3.org/2001/XMLSchema" > targetNamespace="http://www.used.org" > elementFormDefault="qualified"> > > <element name="Root"> > <complexType> > <sequence> > <element name="child" type="boolean" /> > </sequence> > </complexType> > </element> > > </schema> > > Validation succeeds with or without the unused namespace. > > > Conclusion: it appears that one mechanism for detecting unused namespaces in an XML document is to validate it against a DTD. Can anyone think of a case where a DTD would not detect an unused namespace? > > /Roger > > > _______________________________________________________________________ > > XML-DEV is a publicly archived, unmoderated list hosted by OASIS > to support XML implementation and development. To minimize > spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@l... > subscribe: xml-dev-subscribe@l... > List archive: http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php > _______________________________________________________________________ XML-DEV is a publicly archived, unmoderated list hosted by OASIS to support XML implementation and development. To minimize spam in the archives, you must subscribe before posting. [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ Or unsubscribe: xml-dev-unsubscribe@l... subscribe: xml-dev-subscribe@l... List archive: http://lists.xml.org/archives/xml-dev/ List Guidelines: http://www.oasis-open.org/maillists/guidelines.php
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