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 * Licensed to the Apache Software Foundation (ASF) under one
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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.uima.flow;

 * Represents the next destination or destinations to which a CAS should be routed. A
 * <code>Step</code> is the output of the {@link Flow#next()} method. A Flow should output an
 * instance of a concrete class that extends Step. Currently, these are:
 * <ul>
 * <li>{@link SimpleStep} - specifies a single AnalysisEngine to which the CAS should next be
 * routed</li>
 * <li>{@link ParallelStep} - specifies multiple AnalysisEngine to which the CAS should next be
 * routed, where the relative order in which these Analysis Engines execute does not matter.</li>
 * <li>{@link FinalStep} - indicates that there are no more destinations for this CAS.</li>
 * </ul>
00034 public abstract class Step {

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