This directory contains subdirectories full of example document type
definitions from other projects.  The directories are:

aap     - The American Association of Publishers' Standard for Electronic
	  Manuscript Preparation and Markup DTDs.  These later became the
	  ANSI/NISO Z39.59 DTDs.

cals    - The U.S. Department of Defense Computer-Aided Acquisition and
	  Logistics (CALS) initiative DTDs.

iso     - The ISO character set entity declarations, for including special
	  characters in a document.

tei     - The Text Encoding Initiative's DTDs.

