Provided by: tcllib_1.14-dfsg-1_all bug

NAME

       doctools::toc::export::nroff - nroff export plugin

SYNOPSIS

       package require Tcl  8.4

       package require doctools::toc::export::nroff  ?0.2?

       package require doctools::text

       package require doctools::nroff::man_macros

       export serial configuration

_________________________________________________________________

DESCRIPTION

       This package implements the doctools table of contents export plugin for the generation of
       nroff markup.

       This is an internal package of doctools, for use by the higher level  management  packages
       handling tables of contents, especially doctools::toc::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::toc::export and the export manager objects it provides.

API

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

       export serial configuration
              This command takes the canonical serialization of a table of contents, as specified
              in  section ToC serialization format, and contained in serial, the configuration, a
              dictionary, and generates nroff markup encoding the table.  The created  string  is
              then returned as the result of the command.

CONFIGURATION

       The  nroff  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  table  of
              contents  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 inline
              If  this  flag  is  set  (default) the plugin will place the definitions of the man
              macro set directly into the output.

              If this flag is not set, the plugin will place a reference to  the  definitions  of
              the man macro set into the output, but not the macro definitions themselves.

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

TOC SERIALIZATION FORMAT

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

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

       regular serialization

              [1]    The serialization of any table of contents is a nested Tcl dictionary.

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

              [3]    The contents of the table of contents are a Tcl dictionary holding the title
                     of the table of contents, a label, and its elements. The relevant  keys  and
                     their values are

                     title  The value is a string containing the title of the table of contents.

                     label  The value is a string containing a label for the table of contents.

                     items  The  value  is  a  Tcl list holding the elements of the table, in the
                            order they are to be shown.

                            Each element is a Tcl list holding the type  of  the  item,  and  its
                            description,  in this order. An alternative description would be that
                            it is a Tcl dictionary holding a single key, the item type, mapped to
                            the item description.

                            The two legal item types and their descriptions are

                            reference
                                   This  item  describes a single entry in the table of contents,
                                   referencing a single document.  To this end its value is a Tcl
                                   dictionary  containing  an  id  for the referenced document, a
                                   label,  and  a  longer  textual  description  which   can   be
                                   associated with the entry.  The relevant keys and their values
                                   are

                                   id     The value is a string containing the id of the document
                                          associated with the entry.

                                   label  The  value  is  a  string  containing  a label for this
                                          entry. This string also identifies the  entry,  and  no
                                          two   entries   (references   and   divisions)  in  the
                                          containing list are allowed to have the same label.

                                   desc   The value is a string containing a  longer  description
                                          for this entry.

                            division
                                   This  item  describes  a  group  of  entries  in  the table of
                                   contents, inducing a hierarchy of entries.  To  this  end  its
                                   value is a Tcl dictionary containing a label for the group, an
                                   optional id to a document for the whole group, and the list of
                                   entries in the group.  The relevant keys and their values are

                                   id     The value is a string containing the id of the document
                                          associated with the whole group. This key is optional.

                                   label  The value is a string containing a label for the group.
                                          This  string  also  identifies  the  entry,  and no two
                                          entries (references and divisions)  in  the  containing
                                          list are allowed to have the same label.

                                   items  The  value  is  a  Tcl list holding the elements of the
                                          group, in the order they are to be  shown.   This  list
                                          has  the  same  structure  as the value for the keyword
                                          items used to describe the whole table of contents, see
                                          above.  This  closes  the  recusrive  definition of the
                                          structure, with divisions  holding  the  same  type  of
                                          elements  as  the  whole  table  of contents, including
                                          other divisions.

       canonical serialization
              The canonical serialization of a table of contents 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 this table of contents.

              [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.

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

       doctools, export, nroff, serialization, table of contents, toc

CATEGORY

       Text formatter plugin

COPYRIGHT

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