The category ID of elements appearing in the schedule.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since:
2013
Syntax
Remarks
Most schedules show elements of a single category. In multi-category
schedules, the category ID is InvalidElementId. In key schedules,
the schedule's category is the category of elements that the keys are
associated with.