FYI - seen at imsglobal.org
IMS Global Learning Consortium Announces Additional Plans for Supporting the Common Cartridge Digital Learning Standards by ANGEL, Desire2Learn, eCollege, Giunti Labs, Icodeon, Moodle, and Ucompass
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Common Cartridge provides a standard open format for producing digital learning content that can be interpreted by learning systems supporting the standard. Common Cartridge supports incorporation of downloaded content such as test items, assessments, and initiation of collaborative discussions, along with protected access to web-based content and learning applications (based on the Learning Tools Interoperability protocol).
