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<?xml version="1.0"?>
<!--
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->
<!--
   This document is an example of using deep history
-->
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0"
       initialstate="flow">

    <state id="flow">
        <initial>
            <transition target="phases"/>
        </initial>

        <!-- deep history is specified by setting the type attribute
             to "deep" -->

        <history id="hist" type="deep">

            <!-- This is the transition to be followed if no
                 prior history is available -->

            <transition target="phases"/>

        </history>

        <state id="phases">

            <initial>
                <transition target="phase1"/>
            </initial>

            <state id="phase1">
                <transition event="phase.done" target="phase2"/>
            </state>

            <state id="phase2">
                <transition event="phase.done" target="phase3"/>
            </state>

            <state id="phase3" final="true" />

        </state>

        <transition event="flow.pause" target="interrupted"/>

        <transition event="flow.terminate" target="terminated"/>

    </state>

    <state id="interrupted">

        <transition event="flow.resume" target="hist"/>

        <transition event="flow.terminate" target="terminated"/>

    </state>

    <state id="terminated" final="true"/>

</scxml>