Multi-reference annotations are annotations pointing to more than one reference, consisting of a dimension and associated tag.
Assembly: RevitAPI (in RevitAPI.dll) Version: 22.214.171.124 (126.96.36.199)
Multi-reference annotations can be used to label and dimension Rebar elements, and are labeled in the user interface as "Multi-rebar annotations". MultiReferenceAnnotation is the annotation object instance. This class includes a reference to the associated dimension and tag element.