built-in shelf


#appinfo is a built-in, read-only stream that provides the value of the appinfo parameter of an SGML declaration.

Whether the #appinfo shelf has a value depends on the state of SGML parsing. It has a value only if the SGML declaration has already been parsed and it had an appinfo declaration other than none. If this is not the case, it is unattached. Therefore, #appinfo is never attached in

If an SGML declaration was not given, or if appinfo none was specified in the SGML declaration, #appinfo is unattached.