Structure
The DDMS is designed using a layered approach, combining a Core Layer and an Extensible Layer surrounded by the DDMS Resource Header. The Core Layer is composed of five sets of element categories, each with a specific functional focus for describing a data asset: * The Metacard elements describe the DDMS resource itself. * The Security elements enable the description of security classification of the described resource, Need-to-Know (NTK) information, and related notices. * The Resource elements enable the description of maintenance and administration information. * The Summary Content elements enable the description of concepts and topics. * The Format elements enable the description of physical attributes of the asset. * The Extensible Layer is designed to support domain-specific orEarlier versions
* DDMS Version 4.1 (released June 12, 2012) * DDMS Version 4.0.1 (released November 18, 2011) * DDMS Version 4.0 (released September 22, 2011) * DDMS Version 3.1 (released July 5, 2011) * DDMS Version 3.0.1 (released March 4, 2011, documentation update only) * DDMS Version 3.0 (released September 2, 2010) * DDMS Version 3.0 Pre-Release (released January 2010, pending ICISM modification). * DDMS Version 2.0 (released July 17, 2008) * DDMS Version 1.4 (released July 1, 2007) * DDMS Version 1.3 (released July 29, 2005) * DDMS Version 1.2 (released January 3, 2005) * DDMS Version 1.1 (released July 1, 2004) * DDMS Version 1.0 (released September 29, 2003) Major version releases contain changes which break backwards compatibility with earlier versions.References