gml:directedNode

A gml:directedNode property element describes the boundary of topology edges and is used in the support of topological point features via the gml:TopoPoint expression, see below. The orientation attribute of type gml:SignType expresses the sense in which the included node is used: start ("-") or end ("+") node.

Element information

Content

• gml:Node [0..1]gml:Node represents the 0-dimensional primitive. The optional coboundary of a node (gml:directedEdge) is a sequence of directed edges which are incident on this node. Edges emanating from this node appear in the node coboundary with a negative orientation. If provided, the aggregationType attribute shall have the value "sequence". A node may optionally be realised by a 0-dimensional geometric primitive (gml:pointProperty).

Attributes

Used in

• Type gml:EdgeType (Element gml:Edge)
• Type gml:TopoPointType (Element gml:TopoPoint)

Sample instance

<gml:directedNode>
   <gml:Node gml:id="ID">
      <gml:metaDataProperty>
         <gml:GenericMetaData>Any text, intermingled with:
            <!--any element-->
         </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:container>
         <gml:Face gml:id="ID">...
         </gml:Face>
      </gml:container>
      <gml:directedEdge>
         <gml:Edge gml:id="ID">...
         </gml:Edge>
      </gml:directedEdge>
      <gml:pointProperty>
         <gml:Point gml:id="ID">...
         </gml:Point>
      </gml:pointProperty>
   </gml:Node>
</gml:directedNode>