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.IX Title "DerivedSchema 3pm"
.TH DerivedSchema 3pm 2025-09-28 "Lire 2.1.1" "LogReport's Lire Documentation"
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.SH NAME
Lire::DerivedSchema \- Defines a schema for which the records are derived from another schema
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 2
\&  my $schema = Lire::DlfSchema::load_schema( \*(Aqwww\-user_session\*(Aq );
\&  my $fields = $schema\->fields();
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
A Lire::DerivedSchema defines a schema for which the records are
computed by an analyser using the records of a base schema. An example
of a derived schema is the www\-user_session schema which computes
session information from the records in the www schema.
.SS \fBbase()\fP
.IX Subsection "base()"
Returns the Lire::DlfSchema object from which this schema\*(Aqs records are
derived.
.ie n .SS "can_join_schema( $schema )"
.el .SS "can_join_schema( \f(CW$schema\fP )"
.IX Subsection "can_join_schema( $schema )"
Returns true if \f(CW$schema\fR can be joined with this schema. For a
DerivedSchema, this will be true only when \f(CW$schema\fR is an
ExtendedSchema of this schema or this schema\*(Aqs base. It is also
possible to join the DerivedSchema with its base.
.SH AUTHOR
.IX Header "AUTHOR"
Francis J. Lacoste <flacoste@logreport.org>
.SH VERSION
.IX Header "VERSION"
\&\f(CW$Id:\fR DerivedSchema.pm,v 1.19 2006/07/23 13:16:28 vanbaal Exp $
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright (C) 2001, 2004 Stichting LogReport Foundation LogReport@LogReport.org
.PP
This file is part of Lire.
.PP
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.
.PP
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.
.PP
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.