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Simple assert on descendant nodes does not throw error

From: Christophe Marchand <cmarchand@oxiane.com>
Date: Tue, 6 Sep 2016 18:21:22 +0200
To: xmlschema-dev@w3.org
Message-ID: <74836bd8-45cc-f95b-1d5e-ecaf98f7864a@oxiane.com>

I've just added a simple assert to my schema, and I can not get errors 
validating wrong documents. I can nto find why.
Any help will be much appreciated...


My schema :
     <xs:complexType name="TPipe">
             <xs:choice maxOccurs="unbounded">
                 <xs:element name="xslt" />
         <xs:attribute name="nbThreads" type="xs:integer" default="1" 
         <xs:attribute name="mutiThreadMaxSourceSize"/>
         <xs:attribute name="traceOutput" type="xs:string"/>
         <xs:assert test="if(not(./@traceOutput)) then 
empty(descendant::xslt[@traceActive='true']) else true()"/>
     <xs:element name="pipe" type="cfg:TPipe"/>

The document I expect an error to be thrown for :
     <pipe nbThreads="1" mutiThreadMaxSourceSize="" >
                 <xslt href="src/test/resources/identity.xsl" 
                 <output id="pipe1" >
                     <folder absolute="./target/generated-test-files"/>
                     <fileName name="${basename}-pipe1.xml"/>
Received on Wednesday, 7 September 2016 07:27:32 UTC

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