<?xml version="1.0"?>
<xs:schema elementFormDefault="qualified" targetNamespace="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/1999/xlink" xmlns:xs="http://www.w3.org/2001/XMLSchema">

   <xs:annotation>
      <xs:documentation>
   This schema declares the subset of XLink attributes used for BrainMetaL
   'link' elements.  We could refer to the outside world here, but this would
   be overkill for one attribute..
 </xs:documentation>
   </xs:annotation>

   <xs:attribute name="href" type="xs:anyURI">
      <xs:annotation>
         <xs:documentation>Reference to linked resource; should be a URL or URN.</xs:documentation>
      </xs:annotation>
   </xs:attribute>

   <xs:attribute name="role" type="xs:anyURI">
      <xs:annotation>
         <xs:documentation>
   Should be a URL referring to a relation defined in a file conforming to
   "relations.xsd".
</xs:documentation>
      </xs:annotation>
   </xs:attribute>
</xs:schema>