How do I include common targets from an external file?

[Liu, Kenneth Albert (Kenneth)** CTR **]

Hi all -

What I have is several projects which have the same structure and many
similar targets.  What I would like to do is factor all these similar
targets into a common.xml file and include that into my build files.

Any ideas on how to do this?  I tried searching the archives, but I can't
find a definitive answer.

Thanks.

Ken