The referenced MEPPart (segment or fitting) type in this rule. It may be InvalidElementId if no MEPPart will be allowed when the conditions satisfy the criteria in this rule.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since:
2013