Now that you are ready to start writing SGML declarations, there
are a few additional items to keep in mind:
- SGML declarations are always encoded using the reference
concrete syntax, which means the keywords, delimiters,
quantities, etc. used in the SGML declaration cannot be
- The only data characters allowed without the use of numeric
character references are minimum data characters (basically
alpha-numerics, a few special characters, RE, RS and SPACE).
One character that would be useful but that is not valid is the
backslash used in MS-DOS directory specifications.
- Entity references are not allowed (how would you declare them),
although external entities may be referenced in a few, defined
cases using public identifiers.
Wayne L. Wohler,
Publishing Solutions Development,
PO Box 1900,
Boulder, Colorado 80301-9191