/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.model;
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import org.jbpm.api.ProcessDefinition;
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/**
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* a graph (or tree) structure that can be executed.
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*
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* <h2>Purpose</h2>
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* <p>ProcessDefinition is a base implementation that can be leveraged to build
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* graph based execution languages. While the ProcessDefinition class is concrete and
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* can be used as-is (e.g. by aggregation), most likely processDefinition languages
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* will inherit from this ProcessDefinition and create more specialized implementations.
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* </p>
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*
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* <p>The specialized processDefinition language classes can extend this ProcessDefinition
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* with new datastructures relevant for that perticular processDefinition language.
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* </p>
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*
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* <h2>Structure</h2>
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* <p>A processDefinition contains a set of activities. Activities can be connected with
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* transitions or activities can have nested activities. But the transitions and
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* nested activities can be combined.
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* </p>
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*
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* <h2>Execution</h2>
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* <p>To create a new execution for a given processDefinition, see {@link #startExecution()}.
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* </p>
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*
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* @author Tom Baeyens
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*/
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public interface OpenProcessDefinition extends ProcessDefinition, CompositeElement {
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/** the initial activity of this process definition */
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Activity getInitial();
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}
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