Compound Document Format

Compound Document Format (CDF) is a set of W3C candidate standards describing electronic document file formats that contains multiple formats, such as SVG, XHTML, SMIL and XForms. The core standards are the Web Integration Compound Document and the Compound Document by Reference Framework (CDR). As of August 19, 2010, the Compound Document Format working group has been closed, and W3C's development of the standard discontinued.
References
External links

Official website
ARS Technica Feature
The Standards blog "Putting the OpenDocument Foundation to Bed (without its supper)"
Marbux "Putting Andy Updegrove to Bed (without his supper)", Setting the Record Straight - Universal Interoperability Council, 6 February 2008

...