Complex type for the <key> element.

<?xml version="1.0" encoding="utf-16"?>
<xs:complexType name="key.type" final="#all">
    <xs:annotation>
        <xs:documentation source="http://graphml.graphdrawing.org/" xml:lang="en">
      Complex type for the &lt;key&gt; element.
    </xs:documentation>
    </xs:annotation>
    <xs:sequence>
        <xs:element ref="desc" minOccurs="0" />
        <xs:element ref="default" minOccurs="0" />
    </xs:sequence>
    <xs:attribute name="id" type="xs:NMTOKEN" use="required">
        <xs:annotation>
            <xs:documentation source="http://graphml.graphdrawing.org/" xml:lang="en">identifies this &lt;key&gt;.
          </xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="for" type="key.for.type" default="all">
        <xs:annotation>
            <xs:documentation source="http://graphml.graphdrawing.org/" xml:lang="en">
                 describes the domain of definition for 
                 the corresponding graph attribute. 
          </xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attributeGroup ref="key.extra.attrib">
        <xs:annotation>
            <xs:documentation source="http://graphml.graphdrawing.org/" xml:lang="en">
                  user defined extra attributes for &lt;key&gt; elements.
          </xs:documentation>
        </xs:annotation>
    </xs:attributeGroup>
</xs:complexType>

• key.type
• g:key