'\"
'\" Generated from file 'doctools_lang_syntax\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2007 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "doctools_lang_syntax" n 1\&.0 tcllib "Documentation tools"
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.BS
.SH NAME
doctools_lang_syntax \- doctools language syntax
.SH DESCRIPTION
.PP
This document contains the formal specification of the syntax of the
doctools markup language, version 1 in Backus-Naur-Form\&. This document
is intended to be a reference, complementing the
\fIdoctools language command reference\fR\&.
A beginner should read the much more informally written
\fIdoctools language introduction\fR first before trying to
understand either this document or the command reference\&.
.SH FUNDAMENTALS
In the broadest terms possible the \fIdoctools markup language\fR
is LaTeX-like, instead of like SGML and similar languages\&. A document
written in this language consists primarily of text, with markup
commands embedded into it\&.
.PP
Each markup command is a just Tcl command surrounded by a matching
pair of \fB[\fR and \fB]\fR\&. Which commands are available,
and their arguments, i\&.e\&. syntax is specified in the
\fIdoctools language command reference\fR\&.
.PP
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\&.
.SH "LEXICAL DEFINITIONS"
In the syntax rules listed in the next section
.IP [1]
<TEXT> stands for all text except markup commands\&.
.IP [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 \fB[\fR and \fB]\fR\&. Inside of these
delimiters the usual rules for a Tcl command apply with regard to word
quotation, nested commands, continuation lines, etc\&.
.IP [3]
<WHITE> stands for all text consisting only of spaces, newlines,
tabulators and the \fBcomment\fR markup command\&.
.PP
.SH SYNTAX
The rules listed here specify only the syntax of doctools
documents\&. The lexical level of the language was covered in the
previous section\&.
.PP
Regarding the syntax of the (E)BNF itself
.IP [1]
The construct { X } stands for zero or more occurrences of X\&.
.IP [2]
The construct [ X ] stands for zero or one occurrence of X\&.
.IP [3]
The construct LIST_BEGIN<X> stands for the markup command
\fBlist_begin\fR with \fBX\fR as its type argument\&.
.PP
The syntax:
.CS


manpage = defs
          MANPAGE_BEGIN
          header
          DESCRIPTION
          body
          MANPAGE_END
          { <WHITE> }

defs    = { INCLUDE | VSET | <WHITE> }

header  = { TITLEDESC | MODDESC | COPYRIGHT | REQUIRE | defs | xref }

xref    = KEYWORDS | SEE_ALSO | CATEGORY

body    = paras { SECTION    sbody  }
sbody   = paras { SUBSECTION ssbody }
ssbody  = paras

paras   = tblock { (PARA | NL) tblock }

tblock  = { <TEXT> | defs | markup | xref | an_example | a_list }

markup  = ARG     | CLASS | CMD     | CONST     | EMPH   | FILE
        | FUN     | LB    | METHOD  | NAMESPACE | OPT    | OPTION
        | PACKAGE | RB    | SECTREF | STRONG    | SYSCMD | TERM
        | TYPE    | URI   | USAGE   | VAR       | WIDGET

example = EXAMPLE
        | EXAMPLE_BEGIN extext EXAMPLE_END

extext  = { <TEXT> | defs | markup }

a_list  = LIST_BEGIN<arguments>   argd_list   LIST_END
        | LIST_BEGIN<commands>    cmdd_list   LIST_END
        | LIST_BEGIN<definitions> def_list    LIST_END
        | LIST_BEGIN<enumerated>  enum_list   LIST_END
        | LIST_BEGIN<itemized>    item_list   LIST_END
        | LIST_BEGIN<options>     optd_list   LIST_END
        | LIST_BEGIN<tkoptions>   tkoptd_list LIST_END

argd_list   = [ <WHITE> ] { ARG_DEF      paras }
cmdd_list   = [ <WHITE> ] { CMD_DEF      paras }
def_list    = [ <WHITE> ] { (DEF|CALL)   paras }
enum_list   = [ <WHITE> ] { ENUM         paras }
item_list   = [ <WHITE> ] { ITEM         paras }
optd_list   = [ <WHITE> ] { OPT_DEF      paras }
tkoptd_list = [ <WHITE> ] { TKOPTION_DEF paras }

.CE
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIdoctools\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH "SEE ALSO"
doctools_intro, doctools_lang_cmdref, doctools_lang_faq, doctools_lang_intro
.SH KEYWORDS
doctools commands, doctools language, doctools markup, doctools syntax, markup, semantic markup
.SH CATEGORY
Documentation tools
.SH COPYRIGHT
.nf
Copyright (c) 2007 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi
