The AEGIS DTD package consists of an SGML or XML DTD along with their ISO character entity sets. The AEGIS SGML DTD is the Version 2.0 (December 1, 2008) revision of the AEGIS ETM 2 Version 1.9 DTD based on the NAVSEA Class 2 Revision C Version 1.2 DTD (September 30, 1997).
The AEGIS XML DTD Version 1.0 (December 1, 2008) is a translation of the above AEGIS SGML Version 2 DTD (December 1, 2008) into XML. It has been modified for use in producing XML AEGIS ETMs.
The Aegis XML DTD Version 2.0 (dated December 6, 2010) is a revision to the Aegis XML DTD Version 1.0 (dated December 1, 2008). The Aegis XML 2.0 DTD allows for tagging a "Master Instance" document that can then be transformed into specific "TM Instances" through XSLT for publication through the use of pairing values from a couple of attributes and comparing those values to a configuration database. This is the current DTD being used for development of Aegis Technical Publications and Content@.
The DTDs include graphic format notations, International Organization for Standardization (ISO) character set declarations, and the definitions of elements allowed by the document type.
The Aegis DTD is used to create various types of technical manuals including:
Operating Principles and Procedures (OPPs)
Quick Reference Guides (QRGs)
The Aegis DTD allows a generic chapter to section to paragraph to subparagraph structure. Aegis XML 2.0 also includes attributes for denoting effectivity/configuration at various levels in the structure. The Aegis DTD also supports the section to paragraph to subparagraph structure without chapters used in Quick Reference Guides (QRGs).