Provided by: tcllib_1.19-dfsg-2_all bug

NAME

       doctools::idx::export::docidx - docidx export plugin

SYNOPSIS

       package require Tcl  8.4

       package require doctools::idx::export::docidx  ?0.1?

       export serial configuration

_________________________________________________________________________________________________

DESCRIPTION

       This  package  implements  the  doctools keyword index export plugin for the generation of
       docidx 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 docidx markup encoding the  index.   The
              created string is then returned as the result of the command.

[DOCIDX] NOTATION OF KEYWORD INDICES

       The  docidx  format  for  keyword  indices, also called the docidx markup language, is too
       large to be covered in single section.   The  interested  reader  should  start  with  the
       document

       [1]    docidx language introduction

       and then proceed from there to the formal specifications, i.e. the documents

       [1]    docidx language syntax and

       [2]    docidx language command reference.

       to get a thorough understanding of the language.

CONFIGURATION

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

       string user
              This standard configuration variable contains the name  of  the  user  running  the
              process which invoked the export plugin.  The plugin puts this information into the
              provenance comment at the beginning of the generated document.

       string file
              This standard configuration variable contains the name of the file the  index  came
              from.  This  variable  may not be set or contain the empty string.  The plugin puts
              this information, if  defined,  i.e.  set  and  not  the  empty  string,  into  the
              provenance comment at the beginning of the generated document.

       boolean newlines
              If  this  flag is set the plugin will break the generated docidx code across lines,
              with each markup command on a separate line.

              If this flag is not set (the default), the whole document  will  be  written  on  a
              single line, with minimum spacing between all elements.

       boolean indented
              If  this  flag  is  set the plugin will indent the markup commands according to the
              structure of indices. To make this work this also implies  that  newlines  is  set.
              This effect is independent of the value for aligned however.

              If this flag is not set (the default), the output is formatted as per the values of
              newlines and aligned, and no indenting is done.

       boolean aligned
              If this flag is set the generator ensures that the arguments for  the  manpage  and
              url  commands  in a keyword section are aligned vertically for a nice table effect.
              To make this  work  this  also  implies  that  newlines  is  set.  This  effect  is
              independent of the value for indented however.

              If this flag is not set (the default), the output is formatted as per the values of
              newlines and indented, and no alignment is done.

       Note that this plugin ignores the standard configuration variables format,  and  map,  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

       docidx, doctools, export, index, serialization

CATEGORY

       Text formatter plugin

COPYRIGHT

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