<attribute name="type">
  <simpleType>
    <annotation>
      <documentation>Enumeration of values for the type attribute</documentation>
    </annotation>
    <restriction base="string">
      <enumeration value="simple"/>
      <enumeration value="extended"/>
      <enumeration value="locator"/>
      <enumeration value="arc"/>
      <enumeration value="resource"/>
      <enumeration value="title"/>
    </restriction>
  </simpleType>
</attribute>

<attribute name="label" type="NCName"/>

<attribute name="href" type="anyURI"/>

<attribute name="role">
  <simpleType>
    <annotation>
      <documentation>A URI with a minimum length of 1 character.</documentation>
    </annotation>
    <restriction base="anyURI">
      <minLength value="1"/>
    </restriction>
  </simpleType>
</attribute>

<attribute name="arcrole">
  <simpleType>
    <annotation>
      <documentation>A URI with a minimum length of 1 character.</documentation>
    </annotation>
    <restriction base="anyURI">
      <minLength value="1"/>
    </restriction>
  </simpleType>
</attribute>

<attribute name="title" type="string"/>

<attribute name="show">
  <simpleType>
    <annotation>
      <documentation>Enumeration of values for the show attribute</documentation>
    </annotation>
    <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>
    <annotation>
      <documentation>Enumeration of values for the actuate attribute</documentation>
    </annotation>
    <restriction base="string">
      <enumeration value="onLoad"/>
      <enumeration value="onRequest"/>
      <enumeration value="other"/>
      <enumeration value="none"/>
    </restriction>
  </simpleType>
</attribute>

<attribute name="from" type="NCName"/>

<attribute name="to" type="NCName"/>