EMC Corporation, IBM and Microsoft today announced a jointly developed specification which uses Web Services and Web 2.0 interfaces to enable applications to interoperate with multiple Enterprise Content Management (ECM) repositories of different vendors.
CMIS is a technical specification domain model (data and services) for interacting with an ECM repository via Web Services. It provides a content management domain-specific data model, a set of generic services that act on that data model and several protocol bindings for these services, including: Simple Object Access Protocol (SOAP) and Representational State Transfer (REST)/(ATOM)
It is intended that the CMIS specification will be submitted to OASIS (Organization for the Advancement of Structured Information Standards).
By working with other ECM vendors, hopefully this proposed standard will simplify cross-system content exchange by easing some of the implementation complexity.
If you want to read the spec, go here: http://go.microsoft.com/fwlink/?LinkId=127855