Via the CMSWatch, I took a look at this MSDN article on Microsoft’s first attempt at showing how SharePoint and CMIS might work.

The article links to this SharePoint solution that implements CMIS external document libraries. The focus is on bringing content into SharePoint via CMIS, not in exposing SharePoint content. In this preview, they implement custom fields on the documents, workflow and search support, and single sign-on.

One thing to note is that this is what is possible today using the SharePoint object model, not necessarily how it will actually be implemented. For example, to participate in workflow, the external library implementation uses a hidden document library. I wouldn’t expect that in the official version.

Still, it’s interesting to see that CMIS can be leveraged today in SharePoint if the need arises. In this example, they integrated SharePoint to a custom external repository and wrote the CMIS layer themselves on top of it. This makes it possible for all SharePoint users to try this out even if they don’t have access to FileNet, Documentum, etc.