DTD
===

 - Data type: dtd
     Represents what PSGML knows about the DTD.

 - Function: sgml-dtd-doctype DTD
     The document type name.

 - Function: sgml-dtd-eltypes DTD
     The table of element types.

 - Function: sgml-dtd-entities DTD
     The table of declared general entities (entity-table).

 - Function: sgml-dtd-parameters DTD
     The table of declared parameter entities (entity-table).

 - Function: sgml-dtd-shortmaps DTD
     The list of short reference maps.

 - Function: sgml-dtd-notations DTD
     Not yet implemented.