Schema Central > NIEM 2.1 > topology.xsd > gml:directedEdge
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A gml:directedEdge property element describes the boundary of topology faces, the coBoundary of topology nodes and is used in the support of topological line features via the gml:TopoCurve expression, see below. The orientation attribute of type gml:SignType expresses the sense in which the included edge is used, i.e. forward or reverse.

Element information

Type: gml:DirectedEdgePropertyType

Properties: Global, Qualified



orientation [0..1]gml:SignTypeDefault value is "+".
xlink:type [0..1]xsd:stringFixed value is "simple". from group xlink:simpleLink
xlink:href [0..1]xsd:anyURIfrom group xlink:simpleLink
xlink:role [0..1]xsd:anyURIfrom group xlink:simpleLink
xlink:arcrole [0..1]xsd:anyURIfrom group xlink:simpleLink
xlink:title [0..1]xsd:stringfrom group xlink:simpleLink
xlink:show [0..1]Anonymousfrom group xlink:simpleLink
xlink:actuate [0..1]Anonymousfrom group xlink:simpleLink
nilReason [0..1]gml:NilReasonTypefrom group gml:AssociationAttributeGroup
gml:remoteSchema [0..1]xsd:anyURIfrom group gml:AssociationAttributeGroup
owns [0..1]xsd:booleanDefault value is "false". from group gml:OwnershipAttributeGroup

Used in

Sample instance

   <gml:Edge gml:id="ID">
         <gml:GenericMetaData>Any text, intermingled with:...
      <gml:identifier codeSpace="">string</gml:identifier>
         <gml:TopoSolid gml:id="ID">...
         <gml:Node gml:id="ID">...
         <gml:Face gml:id="ID">...
         <gml:LineString gml:id="ID">...

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