Certain built-in stream and integer shelves exist only to support SGML and XML parsing activity. The following built-shelves may only be accessed within SGML or XML parsing:

• #appinfo
• #doctype
• #markup-parser
• #xmlns-names

Whether #appinfo and #doctype actually provide information depends on the state of the parsing. They provide information only if the document being parsed, or the DTD being used to parse it, provides the information. In particular, this means they are never attached in:

• document-start rules,
• do sgml-parse or do xml-parse actions prior to a %c operator or suppress action, unless a precompiled DTD is used,
• do sgml-parse or do xml-parse actions after the %c operator or suppress action, and
• document-end rules if errors occurred before this information could be determined.

Prerequisite Concepts Aided translation types Markup rules Parsing (XML and SGML)

Related Topics do sgml-parse do xml-parse #appinfo #doctype #markup-parser #markup-error-count #markup-error-total #markup-warning-count #markup-warning-total #xmlns-names

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