xml/tests/testData/xml/ComplexRedefine4.xsd

<?xml version="1.0"?>

<xs:schema targetNamespace="http://simple" xmlns="http://simple" xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified" attributeFormDefault="unqualified">

  <xs:redefine schemaLocation="ComplexRedefine4_2.xsd">

    <xs:attributeGroup name="innerAttributes">
      <xs:attributeGroup ref="innerAttributes"/>
      <xs:attribute name="extended.attr" type="xs:string" use="optional"/>
    </xs:attributeGroup>

  </xs:redefine>

</xs:schema>