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

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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, referring to
one of the documents the index was made for.

url The identifier of the reference is interpreted as an url, referring 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.

       When proposing code changes, please provide unified diffs, i.e the output of diff -u.

       Note further that attachments are strongly preferred over inlined patches. Attachments  can  be  made  by
       going  to the Edit form of the ticket immediately after its creation, and then using the left-most button
       in the secondary navigation bar.

KEYWORDS

       doctools, export, index, plain text, serialization

COPYRIGHT

       Copyright (c) 2009-2019 Andreas Kupries <andreas_kupries@users.sourceforge.net>