Purpose

#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

• a document-start rule,
• a do sgml-parse block, prior to the execution of the first %c or suppress, unless a pre-compiled DTD is used,
• a document-end rule, when errors occurred before this information could be determined.

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

Related Syntax document-end document-start do sgml-parse suppress %c

Related Concepts XML/SGML parsing: built-in shelves

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