Content Data Model (standard, documentation, language) (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]. Last updated: 2014-10-20
