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.\" ========================================================================
.\"
.IX Title "DerivedSchema 3pm"
.TH DerivedSchema 3pm "2006-07-23" "Lire 2.1.1" "LogReport's Lire Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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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 "\fIbase()\fP"
.IX Subsection "base()"
Returns the Lire::DlfSchema object from which this schema's 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$schema\fR is an
ExtendedSchema of this schema or this schema's base. It is also
possible to join the DerivedSchema with its base.
.SH "AUTHOR"
.IX Header "AUTHOR"
Francis J. Lacoste <flacoste@logreport.org>
.SH "VERSION"
.IX Header "VERSION"
\&\f(CW$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 \s-1GNU\s0 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 \s-1WITHOUT\s0 \s-1ANY\s0 \s-1WARRANTY\s0; without even the implied warranty of
\&\s-1MERCHANTABILITY\s0 or \s-1FITNESS\s0 \s-1FOR\s0 A \s-1PARTICULAR\s0 \s-1PURPOSE\s0.  See the
\&\s-1GNU\s0 General Public License for more details.
.PP
You should have received a copy of the \s-1GNU\s0 General Public License
along with this program (see \s-1COPYING\s0); if not, check with
http://www.gnu.org/copyleft/gpl.html.