doctools::idx::export::docidx(n)				Documentation tools				  doctools::idx::export::docidx(n)

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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

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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 doc-
       tools::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  func-
       tionality 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 inter-
       ested 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 ele-
	      ments.

       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 ver-
	      tically 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 contain-
			    ing 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 SF Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

KEYWORDS

       docidx, doctools, export, index, serialization

CATEGORY

       Text formatter plugin

COPYRIGHT

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

doctools2idx								0.1					  doctools::idx::export::docidx(n)