Combining /Merging UML Models

[KF4DGK]

Is it possible to merge or combine UML models from two (or more) different
Visio files into one. Ideally, I'd like to be able to create a sequence
diagram which references many models. Also, the models I have so far, have
been reverse engineered from Visual Studio.

 

[tgwicklund]

In general I find the UML models in Visio are fairly restrictive. I have
found you can copy a diagram from one visio file into another (e.g. "select
all" in a class diagram, copy, then paste in a blank diagram in another file)
and the class definitions move to the new file. However, most of the model
does not move (e.g. typedefs of class members) and I doubt the result is a
consistent model.

I've done sequence diagrams, I just create dummy classes, objects, or actors
as needed for the diagram. But I'm basically using Visio as a drawing tool
and the UML shapes for convenience, they aren't tied to any source code model.