type

<xs:attribute name="type">
  <xs:annotation>
    <xs:documentation>describes the type of graph. Suggested values include: 1] undirected; 2] directed; 3] transitionNetwork; 4] transducer</xs:documentation>
  </xs:annotation>
  <xs:simpleType>
    <xs:union>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="undirected">
            <xs:annotation>
              <xs:documentation>undirected graph</xs:documentation>
            </xs:annotation>
          </xs:enumeration>
        </xs:restriction>
      </xs:simpleType>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="directed">
            <xs:annotation>
              <xs:documentation>directed graph</xs:documentation>
            </xs:annotation>
          </xs:enumeration>
        </xs:restriction>
      </xs:simpleType>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="transitionNetwork">
            <xs:annotation>
              <xs:documentation>a directed graph with distinguished initial and final nodes</xs:documentation>