Content Management Interoperability System.

Had a quick look at this for a client last week.  Managed to get it working with Documentum from .NET clients – a bit slow but it does work.

I used the DotNET client from openCMIS – Apache Chemistry.

DotCMIS is the best thing I found – although I really struggled to get web services working with Documemtum – so I used the AtomPub binding and the session factory.- that seemed to work reasonably well.