Connectivity Rule Examples
In an ArcGIS Geometric Network diagram, you can use one or other of the two Connectivity Rule relationships - Edge-Junction or Edge-Edge. The following examples illustrate the use of each type.
Edge-Junction Connectivity Rule
| • | The Connectivity-Rule (Edge-Junction) connector is a UML binary Association connector |
| • | The connection includes one edge element (�Point�, or �Subtype� with �Point� as parent) and one junction element ( �Polyline� , or �Subtype� with �Polyline� as parent ) element |
| • | Cardinality can be set from the source and target Multiplicity fields on the connector Properties dialog |
| • | You can set the Source Role or Target Role fields to Default on the connector Properties dialog |
| • | All the elements within this Edge-Junction rule must be held in the �GeometricNetwork� package
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Edge-Edge Connectivity Rule
| • | The Connectivity-Rule (Edge-Edge) connector is an UML N-ary Association connector |
| • | The connection should include two edge elements (�Polyline�, or �Subtype� with �Polyline� as parent) and any number of junction elements (�Point�, or �Subtype� with �Point� as parent) |
| • | It is recommended that you use a Direct Association connector, drawn from one of the edge elements to the N-ary element, to indicate the 'from' Class - in the above diagram, Road_cl is the edge element that is set as the 'from' Class; for the rest of connection, you can use Association connectors to connect the edge or junction element and the N-ary element, drawn either from the edge or junction elements to the N-ary element, or from the N-ary element to the edge or junction elements |
| • | Cardinality can be set from the source or target element Multiplicity fields on the connector Properties dialog; you only need to set the multiplicity of one end of the connector - if both ends are set, only the multiplicity of the target end is used |
| • | You must mark one of the Junction-N-ary connections as Default, using the Source Role or Target Role field on the connector Properties dialog |
| • | All the elements within this Edge-Edge rule must be held in the �GeometricNetwork� package
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