The Free On-line Dictionary of Computing (30 December 2018):

Content Data Model

    (CDM) An SGML-based
   specification for interactive maintenance manuals, developed by
   the Air Force Human Resourceas Laboratory (AFHRL) with assistance
   from RJO Enterprises, Incorporated.  CDM models data hierachically
   and data are identified by their content structure with SGML
   mark-up used to identify information classes such as "system
   information", "functions", "tasks" and "steps".

   (http://www.dtic.mil/dtic/tr/fulltext/u2/a205916.pdf).

   ["Final Report - Content Data Model of Organizational Maintenance
   Information for Automated Interchange of Technical Source Data.",
   Chicago, Illinois, Datalogics, Inc., 1998-07-07].

   (2014-10-20)