NAME

       doctoc_lang_syntax - doctoc language syntax

DESCRIPTION

       This  document  contains  the  formal  specification  of  the  syntax of the doctoc markup
       language, version 1.1 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 written 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 entry } [ defs ]

              entry     = ITEM | division

              division  = DIVISION_START
                          contents
                          DIVISION_END

BUGS, IDEAS, FEEDBACK

       This  document,  and  the  package  it  describes, will undoubtedly contain bugs and other
       problems.   Please  report  such  in  the  category  doctools  of  the   Tcllib   Trackers
       [http://core.tcl.tk/tcllib/reportlist].  Please also report any ideas for enhancements you
       may have for either package and/or documentation.

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

CATEGORY

       Documentation tools

COPYRIGHT

       Copyright (c) 2007-2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>