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 #   | 
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 # The contents of this file are subject to the Mozilla Public  | 
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 # License Version 1.1 (the "License"); you may not use this file  | 
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 # except in compliance with the License. You may obtain a copy of  | 
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 # the License at http://www.mozilla.org/MPL/  | 
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 #   | 
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 # Software distributed under the License is distributed on an "AS  | 
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 # IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or  | 
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 # implied. See the License for the specific language governing  | 
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 # rights and limitations under the License.  | 
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 #   | 
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 # The Original Code is the RDF::Core module  | 
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 #   | 
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 # The Initial Developer of the Original Code is Ginger Alliance Ltd.  | 
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 # Portions created by Ginger Alliance are   | 
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 # Copyright (C) 2001 Ginger Alliance Ltd.  | 
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 # All Rights Reserved.  | 
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 # Contributor(s):  | 
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 #   | 
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 # Alternatively, the contents of this file may be used under the  | 
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 # terms of the GNU General Public License Version 2 or later (the  | 
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 # "GPL"), in which case the provisions of the GPL are applicable   | 
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 # instead of those above.  If you wish to allow use of your   | 
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 # version of this file only under the terms of the GPL and not to  | 
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 # allow others to use your version of this file under the MPL,  | 
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 # indicate your decision by deleting the provisions above and  | 
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 # replace them with the notice and other provisions required by  | 
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 # the GPL.  If you do not delete the provisions above, a recipient  | 
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 # may use your version of this file under either the MPL or the  | 
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 # GPL.  | 
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 package RDF::Core::Node;  | 
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 require Exporter;  | 
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 use Carp;  | 
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 sub new {  | 
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     carp "Pure virtual function call.";  | 
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 }  | 
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 sub getLabel {  | 
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     carp "Pure virtual function call.";  | 
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 }  | 
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 sub clone {  | 
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     carp "Pure virtual function call.";  | 
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 }  | 
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 sub isLiteral {  | 
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     my $self = shift;  | 
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     return $self->isa('RDF::Core::Literal')  | 
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 1;  | 
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 __END__  |