ActiveState!

ActivePerl Documentation
Table of Contents

(Usage Statistics)
(about this ver)


* Getting Started
    * Welcome To ActivePerl
    * Release Notes
    * Readme
    * ActivePerl Change Log
* Install Notes
    * Linux
    * Solaris
    * Windows
* ActivePerl Components
    * Overview
    * PPM
    * Windows Specifics
       * OLE Browser
       * PerlScript
       * Perl for ISAPI
       * PerlEZ
* ActivePerl FAQ
    * Introduction
    * Availability & Install
    * Using PPM
    * Docs & Support
    * Windows Specifics
       * Perl for ISAPI
       * Windows 9X/NT/2000
       * Quirks
       * Web Server Config
       * Web programming
       * Programming
       * Modules & Samples
       * Embedding & Extending
       * Using OLE with Perl
* Windows Scripting
    * Active Server Pages
    * Windows Script Host
    * Windows Script Components

Core Perl Documentation


* perl
* perlfaq
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* perlbook

* perlsyn
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* perlstyle
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* perlref
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* perlboot
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* perlobj
* perlbot
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* perlipc
* perlnumber
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* perldiag
* perlfaq1
* perlfaq2
* perlfaq3
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* perlwin32

Pragmas


* attributes
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* lib
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* strict
* subs
* utf8
* vars
* warnings

Libraries


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* XML
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* XSLoader

 main/site/lib/SGMLS/Refs.pm


NAME

SGMLS::Refs


SUPPORTED PLATFORMS

  • Windows
This module is not included with the standard ActivePerl distribution. It is available as a separate download using PPM.

SYNOPSIS

  use SGMLS::Refs;

To create a new reference-manager object using the file ``foo.refs'':

  my $refs = new SGMLS::Refs("foo.refs");

To create a new reference-manager object using the file ``foo.refs'' and logging changes to the file ``foo.log'':

  my $refs = new SGMLS::Refs("foo.refs","foo.log");

To record a reference:

  $refs->put("document title",$title);

To retrieve a reference:

  $title = $refs->get("document title");

To return the number of references changed since the last run:

  $num = $refs->changed;

To print a LaTeX-like warning if any references have changed:

  $refs->warn;


DESCRIPTION

This library can be used together with the SGMLS package to keep track of forward references from one run to another, like the LaTeX .aux files. Each reference manager is an object which reads and then rewrites a file of perl source, with the file name provided by the caller.

Example:

  # Start up the reference manager before the parse.
  sgml('start', sub { $refs = new SGMLS::Refs("foo.refs"); });
  # Warn about any changed references at the end.
  sgml('end', sub { $refs->warn; });
  # Look up the title from the last parse, if available.
  sgml('<div>', sub { 
    my $element = shift;
    my $id = $element->attribute(ID)->value;
    my $title = $refs->get("title:$id") || "[no title available]";
    $current_div_id = $id;
    output "\\section{$title}\n\n";
  });
  # Save the title for the next parse.
  sgml('<head>', sub { push_output('string'); });
  sgml('</head>', sub {
    my $title = pop_output();
    my $id = $current_div_id;
    $refs->put("title:$id",$title);
  });


AUTHOR AND COPYRIGHT

Copyright 1994 and 1995 by David Megginson, dmeggins@aix1.uottawa.ca. Distributed under the terms of the Gnu General Public License (version 2, 1991) -- see the file COPYING which is included in the SGMLS.pm distribution.


SEE ALSO:

the SGMLS manpage, the SGMLS::Output manpage.

 main/site/lib/SGMLS/Refs.pm