<schema targetNamespace=“www.w3.org/1999/xlink

      xmlns:xlink="http://www.w3.org/1999/xlink" 
      xmlns="http://www.w3.org/2001/XMLSchema">
<annotation>
  <documentation xml:lang="en">
    This schema provides the XLink href attribute for use in the MathML2 
    schema. Written by Max Froumentin, W3C.
  </documentation>
</annotation>
<attribute name="href" type="anyURI"/>

</schema>

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