'\"
'\" Generated from file 'idx_introduction\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2009 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "doctools2idx_introduction" n 2\&.0 tcllib "Documentation tools"
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.SH NAME
doctools2idx_introduction \- DocTools - Keyword indices
.SH DESCRIPTION
\fIdocidx\fR (short for \fIdocumentation indices\fR) stands for a
set of related, yet different, entities which are working together for
the easy creation and transformation of keyword indices for
documentation\&.
.PP
These are
.IP [1]
A tcl based language for the semantic markup of a keyword index\&.
Markup is represented by Tcl commands\&.
Beginners should start with the
\fIdocidx language introduction\fR\&.
The formal specification is split over two documents, one dealing with
the \fIdocidx language syntax\fR, the other a
\fIdocidx language command reference\fR\&.
.IP [2]
A set of packages for the programmatic manipulation of keyword indices
in memory, and their conversion between various formats, reading and
writing\&. The aforementioned markup language is one of the formats
which can be both read from and written to\&.
.IP [3]
The system for the conversion of indices is based on a plugin
mechanism, for this we have two APIs describing the interface between
the packages above and the import/export plugins\&.
.PP
.PP
Which of the more detailed documents are relevant to the reader of
this introduction depends on their role in the documentation process\&.
.PP
.IP [1]
A \fIwriter\fR of documentation has to understand the markup language
itself\&. A beginner to docidx should read the more informally written
\fIdocidx language introduction\fR first\&. Having digested this
the formal \fIdocidx language syntax\fR specification should
become understandable\&. A writer experienced with docidx may only
need the \fIdocidx language command reference\fR from time to
time to refresh her memory\&.
.sp
While a document is written the \fBdtp\fR application can be used
to validate it, and after completion it also performs the conversion
into the chosen system of visual markup, be it *roff, HTML, plain
text, wiki, etc\&. The simpler \fBdtplite\fR application makes
internal use of docidx when handling directories of documentation,
automatically generating a proper keyword index for them\&.
.IP [2]
A \fIprocessor\fR of documentation written in the \fIdocidx\fR
markup language has to know which tools are available for use\&.
.sp
The main tool is the aforementioned \fBdtp\fR application provided
by Tcllib\&. The simpler \fBdtplite\fR does not expose docidx to the
user\&. At the bottom level, common to both applications, however we
find the three packages providing the basic facilities to handle
keyword indices, i\&.e\&. import from textual formats, programmatic
manipulation in memory, and export to textual formats\&. These are
.RS
.TP
\fBdoctools::idx\fR
Programmatic manipulation of keyword indices in memory\&.
.TP
\fBdoctools::idx::import\fR
Import of keyword indices from various textual formats\&. The set of
supported formats is extensible through plugin packages\&.
.TP
\fBdoctools::idx::export\fR
Export of keyword indices to various textual formats\&. The set of
supported formats is extensible through plugin packages\&.
.RE
.IP
See also section \fBPackage Overview\fR for an overview of the
dependencies between these and other, supporting packages\&.
.IP [3]
At last, but not least, \fIplugin writers\fR have to understand the
interaction between the import and export packages and their plugins\&.
These APIs are described in the documentation for the two relevant
packages, i\&.e\&.
.RS
.IP \(bu
\fBdoctools::idx::import\fR
.IP \(bu
\fBdoctools::idx::export\fR
.RE
.PP
.SH "RELATED FORMATS"
The docidx format does not stand alone, it has two companion formats\&.
These are called \fIdoctoc\fR and \fIdoctools\fR, and they are
intended for the markup of \fItables of contents\fR, and of general
documentation, respectively\&.
They are described in their own sets of documents, starting at
the \fIDocTools - Tables Of Contents\fR and
the \fIDocTools - General\fR, respectively\&.
.SH "PACKAGE OVERVIEW"
.CS


                                    ~~~~~~~~~~~ doctools::idx ~~~~~~~~~~~
                                   ~~                   |               ~~
                doctools::idx::export ~~~~~~~~~~~~~~~~~ | ~~~~~~~~~~~~~ doctools::idx::import
                        |                               |                       |
        +---------------+-------------------------+     |    +------------------+---------------+-----------------------+---------------+
        |               |                         |     |    |                  |               |                       |               |
struct::map             =                         |     |    |                  =       doctools::include       struct::map      fileutil::paths
                        |                         |     |    |                  |
                doctools::idx::export::<*>        |     |    |          doctools::idx::import::<*>
                        docidx                    |     |    |                  docidx, json
                        json                      |     |    |                  |           \\
                        html                      |     |    |          doctools::idx::parse \\
                        nroff                     |     |    |                  |             \\
                        wiki                      |     |    |  +---------------+              json
                        text                      |     |    |  |               |
                                                doctools::idx::structure        |
                                                                                |
                                                                        +-------+---------------+
                                                                        |                       |
          doctools::html  doctools::html::cssdefaults           doctools::tcl::parse    doctools::msgcat
                |                                                                               |
          doctools::text  doctools::nroff::man_macros                                           =
                                                                                                |
                                                                                        doctools::msgcat::idx::<*>
                                                                                                c, en, de, fr
                                                                                                (fr == en for now)
        ~~      Interoperable objects, without actual package dependencies
        --      Package dependency, higher requires lower package
        =       Dynamic dependency through plugin system
        <*>     Multiple packages following the given form of naming\&.


.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"
docidx_intro, doctoc_intro, doctools, doctools2doc_introduction, doctools2toc_introduction, doctools_lang_cmdref, doctools_lang_faq, doctools_lang_intro, doctools_lang_syntax, doctools_plugin_apiref
.SH KEYWORDS
conversion, formatting, index, keyword index, markup, parsing, plugin, semantic markup
.SH CATEGORY
Documentation tools
.SH COPYRIGHT
.nf
Copyright (c) 2009 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi
