/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program 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; version 2 of the License.
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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Jun 4, 2011
*/
package com.bigdata.rdf.vocab;
import java.util.Iterator;
import org.openrdf.model.URI;
import com.bigdata.rdf.internal.impl.uri.VocabURIShortIV;
import com.bigdata.rdf.store.AbstractTripleStore;
/**
* A class for declaring a {@link Vocabulary}.
* <p>
* Note: Implementations of a {@link VocabularyDecl} MUST be stable across the
* life cycle of an {@link AbstractTripleStore}. For this reason it is strongly
* recommended that new versions of a vocabulary are defined in a new class.
* <p>
* Each class SHOULD provide a declaration for the namespace(s) used by the
* vocabulary. It is convention to expose this {@link String} value as a public
* static field named <code>NAMESPACE</code>. Declaring the namespace used by
* provides for compact encoding of URIs within that namespace (e.g., using a
* {@link VocabURIShortIV} for the namespace and a compressed unicode representation
* of the localName of the URI) even if those URIs were not part of the original
* vocabulary declaration. Thus, it provides a compact fallback encoding if the
* vocabulary evolves after the {@link AbstractTripleStore} has been
* provisioned.
*
* @version $Id$
*/
public interface VocabularyDecl {
/**
* Return an iterator which will visit the declared values. The iterator
* must not support removal.
*/
public Iterator<URI> values();
}