Schematron schema-aware attribute expansion

[dnl]

Hi,

I fail to understand how the attribute expansion works in Oxygen. The XPath "element[@attribute]" in sch:rule/@context is always reporting even if the attribute is optional in the XSD and missing in the XML.
Shouldn't the schematron fail to report since it is an optional attribute and the XPath in sch:rule/@context says "the attribute must be there" in the predicate?

XML:

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<xml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="test.xsd">
  <element>text</element>
</xml>

XSD:

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<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
  <xs:element name="xml">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="element"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:element name="element">
    <xs:complexType mixed="true">
      <xs:attribute name="attribute" default="false"/>
    </xs:complexType>
  </xs:element>
</xs:schema>

Schematron:

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<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2"
  xmlns:sqf="http://www.schematron-quickfix.com/validator/process">
  
  <sch:pattern>
    <sch:rule context="element[@attribute]">
      <sch:report test="text()">has-text</sch:report>
    </sch:rule>
  </sch:pattern>
  
</sch:schema>

Oxygen setting in the Schematron menu: expand attribute values schema-aware checked.

Is this a bug, or am I getting the Schematron XPath handling wrong?
Thanks, Daniel

[tavy]

Hello Daniel ,

If you define an xs:attribute with default="false", it means that the attribute will have a default value equal to false. Because you are using schema aware validation even if the attribute is not present in XML it is present in the model with the default value set to false.
Maybe you can change the context in Schematron and set it to element[@attribute != 'false'].

Best Regards,
Octavian

[dnl]

Thank you Octavian for the explanation