Schema Central > NIEM 2.1 > topology.xsd > gml:directedFace
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gml:directedFace

The gml:directedFace property element describes the boundary of topology solids, in the coBoundary of topology edges and is used in the support of surface features via the gml:TopoSurface expression, see below. The orientation attribute of type gml:SignType expresses the sense in which the included face is used i.e. inward or outward with respect to the surface normal in any geometric realisation.

Element information

Type: gml:DirectedFacePropertyType

Properties: Global, Qualified

Content

Attributes

NameOccTypeDescriptionNotes
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:directedFace>
   <gml:Face gml:id="ID">
      <gml:metaDataProperty>
         <gml:GenericMetaData>Any text, intermingled with:...
         </gml:GenericMetaData>
      </gml:metaDataProperty>
      <gml:description>string</gml:description>
      <gml:descriptionReference/>
      <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier>
      <gml:name>string</gml:name>
      <gml:isolated>
         <gml:Node gml:id="ID">...
         </gml:Node>
      </gml:isolated>
      <gml:directedEdge>
         <gml:Edge gml:id="ID">...
         </gml:Edge>
      </gml:directedEdge>
      <gml:directedTopoSolid>
         <gml:TopoSolid gml:id="ID">...
         </gml:TopoSolid>
      </gml:directedTopoSolid>
      <gml:surfaceProperty>
         <gml:Polygon gml:id="ID">...
         </gml:Polygon>
      </gml:surfaceProperty>
   </gml:Face>
</gml:directedFace>

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