The DefinitionGroup is a container that is used to hold shared parameter definitions on disk.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Syntax
Remarks
Groups are used for logical arrangement of the shared parameters into meaningful sets. Through the DefinitionGroup object new shared parameter definitions can be made.