Export out obia out of the box rpd to xml.
Then you can search all those xml files.
For example:
to search all dimensions and fact objects in Physical layer, related to AP dimensions = PT*Dim*AP*.xml and Facts = PT*Fact*AP*.xml
to search all dimensions and fact objects in BMM layer, related to AP dimensions = LT*Dim*AP*.xml and Facts = LT*Fact*AP*.xml