The public identifiers that can appear in the SGML declaration, for the base character sets, for the capacity set, and for the concrete syntax, are processed in much the same way as with the
#dtd entity. They are identified with the keywords
#syntax, respectively. They are like the
#dtd entity in most respects:
external-text-entity #impliedbut have to be mentioned explicitly.
entity istests together with their identifying keywords.
%qformat item gives the strings
#syntaxfor these entities.
Entities referenced by public identifiers in the SGML declaration have the following properties:
The ISO character entities are defined in external files rather than being "hard coded" inside OmniMark's built-in entity manager, with the files divided as described in Appendix D.4 of ISO 8879, the SGML standard.