--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Lib/IMPL/ORM/Schema/Relation/Subclass.pm	Mon Oct 19 04:13:54 2009 +0400
@@ -0,0 +1,26 @@
+package IMPL::ORM::Schema::Relation::Subclass;
+use strict;
+use warnings;
+
+use base qw(IMPL::ORM::Schema::Relation);
+use IMPL::Class::Property;
+
+BEGIN {
+    public property base => prop_get | owner_set;
+}
+
+our %CTOR = (
+    'IMPL::DOM::Node' => sub { 'Subclass' }
+);
+
+sub CTOR {
+    my ($this,$base) = @_;
+    
+    $this->base($base) or die new IMPL::InvalidArgumentException('A base is required for this relation');
+}
+
+sub canHaveChildren {
+    0;
+}
+
+1;