NAME

       Lire::ExtendedSchema - Adds fields to each DLF records of a base schema

SYNOPSIS

         my $schema = Lire::DlfSchema::load_schema( 'www-robot' );
         my $ext_fields = $schema->extended_fields();

DESCRIPTION

       A Lire::ExtendedSchema defines a DlfSchema which adds fields to each records of a base
       DlfSchema. The values of the extended fields are usually computed from values based on the
       values of the fields in the base Dlf record. These values aren't written by
       Lire::DlfConverters, but by Lire::DlfAnalysers (or usually a Lire::DlfCategoriser).

   base()
       Returns the Lire::DlfSchema object for which this schema's records are an extension.

   can_join_schema( $schema )
       Returns true if $schema can be joined with this schema. For an ExtendedSchema, this will
       be true only when $schema is an ExtendedSchema which shares the same same than this
       schema.

SEE ALSO

       Lire::DlfSchema(3pm), Lire::DerivedSchema(3pm), Lire::DlfAnalyser(3pm),
       Lire::DlfCategoriser(3pm)

AUTHOR

         Francis J. Lacoste <flacoste@logreport.org>

VERSION

       $Id: ExtendedSchema.pm,v 1.24 2006/07/23 13:16:29 vanbaal Exp $

COPYRIGHT

       Copyright (C) 2001 Stichting LogReport Foundation LogReport@LogReport.org

       This file is part of Lire.

       Lire is free software; you can redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation; either version 2 of
       the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program
       (see COPYING); if not, check with http://www.gnu.org/copyleft/gpl.html.