XSD 1.0 validation fails for custom type

Question

This is the definition for my type in the XSD file (using xs:anyURI doesn't work):

  <xs:simpleType name="lastNavigType">
    <xs:restriction base="xs:string">
      <xs:pattern value="qrc\:\/help\/SBBL_[\d]+_[\w]+\.html"/>
    </xs:restriction>
  </xs:simpleType>

And this is the attribute which should validate:

<xs:attribute type="lastNavigType" name="last-navigated" use="required"/>

The XML file has this:

<helpviewer last-zoom="12" last-navigated="qrc:/help/SBBL_67_Graph_Terminology.html" bookmarks="" maximized="true">

I am trying to use the online XSD validation service at https://www.softwarebytes.org/xmlvalidation/ which uses Xerces-J as backend, but it says:

[Error] sbbl_app_settings.xml:20:118:cvc-pattern-valid: Value 'qrc:/help/SBBL_67_Graph_Terminology.html' is not facet-valid with respect to pattern 'qrc\:\/help\/SBBL_[\d]+_[\w]+\.html' for type 'lastNavigType'.
[Error] sbbl_app_settings.xml:20:118:cvc-attribute.3: The value 'qrc:/help/SBBL_67_Graph_Terminology.html' of attribute 'last-navigated' on element 'helpviewer' is not valid with respect to its type, 'lastNavigType'.

On the regex101.com page it passes validation. What is wrong? Thanks.

Answer 1

Please try the following solution.

XSD's regular expressions are different from a generic regex.

Colon ":" and forward slash "/" characters don't require escaping.

XML

<?xml version="1.0"?>
<helpviewer last-navigated="qrc:/help/SBBL_67_Graph_Terminology.html"/>

XSD

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
    <xs:element name="helpviewer">
        <xs:complexType>
            <xs:attribute name="last-navigated" use="required" type="lastNavigType"/>
        </xs:complexType>
    </xs:element>
    <xs:simpleType name="lastNavigType">
        <xs:restriction base="xs:string">
            <xs:pattern value="qrc:/help/SBBL_\d+_\w+_\w+\.html"/>
        </xs:restriction>
    </xs:simpleType>
</xs:schema>