Ubuntu Manpage: doctools::idx::export::text

NAME

       doctools::idx::export::text - plain text export plugin

SYNOPSIS

       package require Tcl  8.4

       package require doctools::idx::export::text  ?0.2?

       package require doctools::text

       export serial configuration

_________________________________________________________________________________________________

DESCRIPTION

       This  package  implements  the  doctools keyword index export plugin for the generation of
       plain text markup.

       This is an internal package of doctools, for use by the higher level  management  packages
       handling keyword indices, especially doctools::idx::export, the export manager.

       Using it from a regular interpreter is possible, however only with contortions, and is not
       recommended.   The  proper  way  to  use  this  functionality  is  through   the   package
       doctools::idx::export and the export manager objects it provides.

API

       The  API  provided by this package satisfies the specification of the docidx export plugin
       API version 2.

       export serial configuration
              This command takes the canonical serialization of a keyword index, as specified  in
              section   Keyword   index  serialization  format,  and  contained  in  serial,  the
              configuration, a dictionary, and generates plain text markup  encoding  the  index.
              The created string is then returned as the result of the command.

CONFIGURATION

       The  text  export  plugin recognizes the following configuration variables and changes its
       behaviour as they specify.

       dictionary map
              This standard  configuration  variable  contains  a  dictionary  mapping  from  the
              symbolic  files  names in manpage references to the actual filenames and/or urls to
              be used in the output.

              Url references and symbolic file names without a mapping are used unchanged.

       Note that this plugin ignores the standard configuration variables user, file, and format,
       and their values.

KEYWORD INDEX SERIALIZATION FORMAT

Here we specify the format used by the doctools v2 packages to serialize keyword indices
as immutable values for transport, comparison, etc.

We distinguish between regular and canonical serializations. While a keyword index may
have more than one regular serialization only exactly one of them will be canonical.

regular serialization

[1] An index serialization is a nested Tcl dictionary.

[2] This dictionary holds a single key, doctools::idx, and its value. This value
holds the contents of the index.

[3] The contents of the index are a Tcl dictionary holding the title of the
index, a label, and the keywords and references. The relevant keys and their
values are

title The value is a string containing the title of the index.

label The value is a string containing a label for the index.

keywords
The value is a Tcl dictionary, using the keywords known to the index
as keys. The associated values are lists containing the identifiers
of the references associated with that particular keyword.

Any reference identifier used in these lists has to exist as a key in
the references dictionary, see the next item for its definition.

references
The value is a Tcl dictionary, using the identifiers for the
references known to the index as keys. The associated values are
2-element lists containing the type and label of the reference, in
this order.

Any key here has to be associated with at least one keyword, i.e.
occur in at least one of the reference lists which are the values in
the keywords dictionary, see previous item for its definition.

[4] The type of a reference can be one of two values,

manpage
The identifier of the reference is interpreted as symbolic file name,
refering to one of the documents the index was made for.

url The identifier of the reference is interpreted as an url, refering to
some external location, like a website, etc.

canonical serialization
The canonical serialization of a keyword index has the format as specified in the
previous item, and then additionally satisfies the constraints below, which make it
unique among all the possible serializations of the keyword index.

[1] The keys found in all the nested Tcl dictionaries are sorted in ascending
dictionary order, as generated by Tcl's builtin command lsort -increasing
-dict.

[2] The references listed for each keyword of the index, if any, are listed in
ascending dictionary order of their labels, as generated by Tcl's builtin
command lsort -increasing -dict.

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.

KEYWORDS

       doctools, export, index, plain text, serialization

COPYRIGHT

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