<?xml version=“1.0” encoding=“UTF-8”?> <!– METS XLink Schema, v. 2, Nov. 15, 2004 –> <!–* Downloaded 27 April 2012 from www.loc.gov/standards/mets/xlink.xsd

* and modified as noted. *-->

<!–* Some cosmetic changes to line breaks. *–> <!–* Add top-level declaration of xtype. *–> <schema targetNamespace=“www.w3.org/1999/xlink

      xmlns="http://www.w3.org/2001/XMLSchema" 
      xmlns:xlink="http://www.w3.org/1999/xlink" 
      elementFormDefault="qualified">

<!--  global attributes  --> 
<attribute name="href"  type="anyURI"/>
<attribute name="role" type="string"/>
<attribute name="arcrole" type="string"/>
<attribute name="title" type="string" /> 
<attribute name="show">
  <simpleType>
    <restriction base="string">
      <enumeration value="new" /> 
      <enumeration value="replace" /> 
      <enumeration value="embed" /> 
      <enumeration value="other" /> 
      <enumeration value="none" /> 
    </restriction>
  </simpleType>
</attribute>
<attribute name="actuate">
  <simpleType>
    <restriction base="string">
      <enumeration value="onLoad" /> 
      <enumeration value="onRequest" /> 
      <enumeration value="other" /> 
      <enumeration value="none" /> 
    </restriction>
  </simpleType>
</attribute>
<attribute name="label" type="string" /> 
<attribute name="from" type="string" /> 
<attribute name="to" type="string" /> 

<attributeGroup name="simpleLink">
  <attribute name="type" type="string" fixed="simple" form="qualified" /> 
  <attribute ref="xlink:href" use="optional" /> 
  <attribute ref="xlink:role" use="optional" /> 
  <attribute ref="xlink:arcrole" use="optional" /> 
  <attribute ref="xlink:title" use="optional" /> 
  <attribute ref="xlink:show" use="optional" /> 
  <attribute ref="xlink:actuate" use="optional" /> 
</attributeGroup>
<attributeGroup name="extendedLink">
  <attribute name="type" type="string" fixed="extended" form="qualified" /> 
  <attribute ref="xlink:role" use="optional" /> 
  <attribute ref="xlink:title" use="optional" /> 
</attributeGroup>
<attributeGroup name="locatorLink">
  <attribute name="type" type="string" fixed="locator" form="qualified" /> 
  <attribute ref="xlink:href" use="required" /> 
  <attribute ref="xlink:role" use="optional" /> 
  <attribute ref="xlink:title" use="optional" /> 
  <attribute ref="xlink:label" use="optional" /> 
</attributeGroup>
<attributeGroup name="arcLink">
  <attribute name="type" type="string" fixed="arc" form="qualified" /> 
  <attribute ref="xlink:arcrole" use="optional" /> 
  <attribute ref="xlink:title" use="optional" /> 
  <attribute ref="xlink:show" use="optional" /> 
  <attribute ref="xlink:actuate" use="optional" /> 
  <attribute ref="xlink:from" use="optional" /> 
  <attribute ref="xlink:to" use="optional" /> 
</attributeGroup>
<attributeGroup name="resourceLink">
  <attribute name="type" type="string" fixed="resource" form="qualified" /> 
  <attribute ref="xlink:role" use="optional" /> 
  <attribute ref="xlink:title" use="optional" /> 
  <attribute ref="xlink:label" use="optional" /> 
</attributeGroup>
<attributeGroup name="titleLink">
  <attribute name="type" type="string" fixed="title" form="qualified" /> 
</attributeGroup>
<attributeGroup name="emptyLink">
  <attribute name="type" type="string" fixed="none" form="qualified" /> 
</attributeGroup>

<!--* Addition for IEEE union schema *-->
<attribute name="type">
  <simpleType>
    <restriction base="string">
      <enumeration value="simple"/>
      <enumeration value="extended"/>
      <enumeration value="locator"/>
      <enumeration value="arc"/>
      <enumeration value="resource"/>
      <enumeration value="title"/>
      <enumeration value="none"/>
    </restriction>
  </simpleType>
</attribute>

</schema>