doctoc_lang_syntax(n)						Documentation tools					     doctoc_lang_syntax(n)

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NAME

       doctoc_lang_syntax - doctoc language syntax

DESCRIPTION

       This  document  contains the formal specification of the syntax of the doctoc markup language, version 1 in Backus-Naur-Form. This document
       is intended to be a reference, complementing the doctoc language command reference.  A beginner should read the much more informally  writ-
       ten doctoc language introduction first before trying to understand either this document or the command reference.

FUNDAMENTALS

       In  the broadest terms possible the doctoc markup language is like SGML and similar languages. A document written in this language consists
       primarily of markup commands, with text embedded into it at some places.

       Each markup command is a just Tcl command surrounded by a matching pair of [ and ]. Which commands are available, and their arguments, i.e.
       syntax is specified in the doctoc language command reference.

       In this document we specify first the lexeme, and then the syntax, i.e. how we can mix text and markup commands with each other.

LEXICAL DEFINITIONS

       In the syntax rules listed in the next section

       [1]    <TEXT> stands for all text except markup commands.

       [2]    Any  XXX	stands for the markup command [xxx] including its arguments. Each markup command is a Tcl command surrounded by a matching
	      pair of [ and ]. Inside of these delimiters the usual rules for a Tcl command apply with regard to word quotation, nested  commands,
	      continuation lines, etc.

       [3]    <WHITE> stands for all text consisting only of spaces, newlines, tabulators and the comment markup command.

SYNTAX

       The rules listed here specify only the syntax of doctoc documents. The lexical level of the language was covered in the previous section.

       Regarding the syntax of the (E)BNF itself

       [1]    The construct { X } stands for zero or more occurrences of X.

       [2]    The construct [ X ] stands for zero or one occurrence of X.

       The syntax:

       toc	 = defs
		   TOC_BEGIN
		   contents
		   TOC_END
		   { <WHITE> }

       defs	 = { INCLUDE | VSET | <WHITE> }
       contents  = defs (items | divisions)

       items	 = ITEM defs { ITEM defs }
       divisions = division defs { division defs }

       division  = DIVISION_START
		   contents
		   DIVISION_END

BUGS, IDEAS, FEEDBACK
       This  document,	will  undoubtedly  contain bugs and other problems.  Please report such in the category doctools of the Tcllib SF Trackers
       [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have.

SEE ALSO

       doctoc_intro, doctoc_lang_cmdref, doctoc_lang_faq, doctoc_lang_intro

KEYWORDS

       doctoc commands, doctoc language, doctoc markup, doctoc syntax, markup, semantic markup

COPYRIGHT

       Copyright (c) 2007 Andreas Kupries <andreas_kupries@users.sourceforge.net>

doctools								1.0						     doctoc_lang_syntax(n)