<xs:schema   
             targetNamespace="http://graphml.graphdrawing.org/xmlns"

             xmlns="http://graphml.graphdrawing.org/xmlns"
             xmlns:xs="http://www.w3.org/2001/XMLSchema"

             elementFormDefault="qualified"
             attributeFormDefault="unqualified"
>
  <xs:annotation>
    <xs:documentation 
        source="http://graphml.graphdrawing.org/"
        xml:lang="en">
     This document defines the attributes extension of the GraphML language.
     It redefines the attribut list of &lt;key> by adding two new 
     attributes:
     - attr.name (gives a name for the data function) and
     - attr.type (declares the range of values for the data function).
     The data values are defined in #PCDATA children of the corresponding
     &lt;data> element.
    </xs:documentation>
  </xs:annotation>


<xs:redefine schemaLocation="graphml-structure.xsd">

  <xs:annotation>
    <xs:documentation 
        source="http://graphml.graphdrawing.org/"
        xml:lang="en">
     Redefinition of file graphml-structure.xsd.
     Extends the attribute group key.extra.attrib (which takes
     part in the attribute list of &lt;key>) by adding the
     attribute group key.attributes.attrib which is defined below.
    </xs:documentation>
  </xs:annotation>

  <xs:attributeGroup name="key.extra.attrib">
    <xs:attributeGroup ref="key.extra.attrib"/>
    <xs:attributeGroup ref="key.attributes.attrib"/>
  </xs:attributeGroup>

</xs:redefine>

<xs:simpleType name="key.name.type" final="#all">

  <xs:annotation>
    <xs:documentation 
        source="http://graphml.graphdrawing.org/(Dokumentation der Attributes Erweiterung; entsprechende Stelle.html)"
        xml:lang="en">
      Simple type for the attr.name attribute of &lt;key>.
      key.name.type is final, that is, it may not be extended
                          or restricted.
      key.name.type is a restriction of xs:NMTOKEN
      Allowed values: (no restriction)
    </xs:documentation>
  </xs:annotation>

  <xs:restriction base="xs:NMTOKEN"/>

</xs:simpleType>



<xs:simpleType name="key.type.type" final="#all">

  <xs:annotation>
    <xs:documentation 
        source="http://graphml.graphdrawing.org/(Dokumentation der Attributes Erweiterung; entsprechende Stelle.html)"
        xml:lang="en">
      Simple type for the attr.type attribute of &lt;key>.
      key.type.type is final, that is, it may not be extended
                          or restricted.
      key.type.type is a restriction of xs:NMTOKEN
      Allowed values: boolean, int, long, float, double, string.
    </xs:documentation>
  </xs:annotation>

  <xs:restriction base="xs:NMTOKEN">  
    <xs:enumeration value="boolean"/>
    <xs:enumeration value="int"/>
    <xs:enumeration value="long"/>
    <xs:enumeration value="float"/>
    <xs:enumeration value="double"/>
    <xs:enumeration value="string"/>
  </xs:restriction>

</xs:simpleType>


<xs:attributeGroup name="key.attributes.attrib">

  <xs:annotation>
    <xs:documentation 
        source="http://graphml.graphdrawing.org/"
        xml:lang="en">
     Definition of the attribute group key.attributes.attrib.
     This group consists of the two optional attributes
         - attr.name (gives the name for the data function)
         - attr.type ((declares the range of values for the data function)
    </xs:documentation>
  </xs:annotation>

  <xs:attribute name="attr.name" type="key.name.type" use="optional"/>
  <xs:attribute name="attr.type" type="key.type.type" use="optional"/>
</xs:attributeGroup>

</xs:schema>

<!--======================================================-->
<!--      end of file: graphml-attributes.xsd             -->
<!--======================================================-->

• key.attributes.attrib

• key.name.type
• key.type.type