流程包括：事件、活动、流、节点
事件
**Event：流程的状态，无条件执行
属性：id、name
起始 <startEvent id="***" name="***" /> 结束 <endEvent id="***" name="***" />
活动
activity：单个的任务
属性：id、name、URI
子元素1：input 属性：name、type、UIR
子元素2：output 属性：name、type、UIR
如：决策服务
<activity id="decide1" name="决策服务1" URI="www.baidu.com">
<input name="Strategy1.xls" type="File" UIR="www.google.com/1" />
<input name="Result.properties" type="File" UIR="www.google.com/2" />
<output name="Strategy3.xls" type="File" UIR="www.google.com/3" />
<output name="Result2.properties" type="File" UIR="www.google.com/4" />
</activity>
流
flow：箭头
属性：id、name、from、to
<process id="..." name="...">
<startEvent id="startEvent1" name="***"/>
<activity id="activity1" name="决策服务1" URI="www.baidu.com">
<input name="Strategy1.xls" type="File" UIR="www.google.com/1" />
<input name="Result.properties" type="File" UIR="www.google.com/2" />
<output name="Strategy3.xls" type="File" UIR="www.google.com/3" />
<output name="Result2.properties" type="File" UIR="www.google.com/4" />
</activity>
<endEvent id="endEvent1" name="***"/>
<flow id="flow1" name="..." from="startEvent1" to="decide1" />
<flow id="flow2" name="..." from="decide1" to="endEvent1" />
</process>
节点：
Node：支路的交点，控制流向
parallelNode并行节点
属性：id，name
<process id="..." name="...">
<!--起始事件-->
<startEvent id="startEvent1" name="Start"/>
<!--活动1-->
<activity id="activity1" name="读取策略" URI="www.baidu.com">
<input name="Strategy1.xls" type="File" UIR="www.google.com/1" />
<input name="Result.properties" type="File" UIR="www.google.com/2" />
<output name="Strategy3.xls" type="File" UIR="www.google.com/3" />
<output name="Result2.properties" type="File" UIR="www.google.com/4" />
</activity>
<!--并行节点-->
<parallelNode id="parallelNode1" name="" />
<!--活动2-->
<activity id="activity2" name="执行检测软件" URI="www.baidu.com">
<input name="Strategy1.xls" type="File" UIR="www.google.com/1" />
<input name="Result.properties" type="File" UIR="www.google.com/2" />
<output name="Strategy3.xls" type="File" UIR="www.google.com/3" />
<output name="Result2.properties" type="File" UIR="www.google.com/4" />
</activity>
<!--活动3-->
<activity id="activity3" name="输出策略" URI="www.baidu.com">
<input name="Strategy1.xls" type="File" UIR="www.google.com/1" />
<input name="Result.properties" type="File" UIR="www.google.com/2" />
<output name="Strategy3.xls" type="File" UIR="www.google.com/3" />
<output name="Result2.properties" type="File" UIR="www.google.com/4" />
</activity>
<!--并行节点-->
<parallelNode id="parallelNode2" name="" />
<!--活动4-->
<activity id="activity4" name="执行决策程序" URI="www.baidu.com">
<input name="Strategy1.xls" type="File" UIR="www.google.com/1" />
<input name="Result.properties" type="File" UIR="www.google.com/2" />
<output name="Strategy3.xls" type="File" UIR="www.google.com/3" />
<output name="Result2.properties" type="File" UIR="www.google.com/4" />
</activity>
<!--结束事件-->
<endEvent id="endEvent1" name="***"/>
<!--流-->
<flow id="flow1" name="..." from="startEvent1" to="activity1" />
<flow id="flow2" name="..." from="activity1" to="parallelNode1" />
<flow id="flow3" name="..." from="parallelNode1" to="activity2" />
<flow id="flow4" name="..." from="activity2" to="parallelNode2" />
<flow id="flow5" name="..." from="parallelNode1" to="activity3" />
<flow id="flow6" name="..." from="activity3" to="parallelNode2" />
<flow id="flow7" name="..." from="parallelNode2" to="activity4" />
<flow id="flow8" name="..." from="activity4" to="endEvent1" />
</process>
原文：https://www.cnblogs.com/zhaideang/p/12283593.html