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What is “di:waypoint ” in BPMN?

Question asked by blertadhimitri on Jan 16, 2014
Latest reply on Jan 17, 2014 by frederikheremans1
Hi everyone!
I've been reading on the XML structure of BPMN files and I have understood everything expect the use of di:waypoint . Can anyone explain me what it is used for? Here is a small xml of a bpmn file:
<?xml version="1.0" encoding="UTF-8"?>
    <definitions id="Definition">
      <process processType="Private" isExecutable="true" id="Minimal" name="Minimal Process" >
     <!– nodes –>
        <startEvent id="_1" name="StartProcess" />
        <scriptTask id="_2" name="Hello" >
          <script>System.out.println("Hello World");</script>
        <endEvent id="_3" name="EndProcess" >
        <!– connections –>
        <sequenceFlow id="_1-_2" sourceRef="_1" targetRef="_2" />
        <sequenceFlow id="_2-_3" sourceRef="_2" targetRef="_3" />
        <bpmndi:BPMNPlane bpmnElement="Minimal" >
          <bpmndi:BPMNShape bpmnElement="_1" >
            <dc:Bounds x="15" y="91" width="48" height="48" />
          <bpmndi:BPMNShape bpmnElement="_2" >
            <dc:Bounds x="95" y="88" width="83" height="48" />
          <bpmndi:BPMNShape bpmnElement="_3" >
            <dc:Bounds x="258" y="86" width="48" height="48" />
          <bpmndi:BPMNEdge bpmnElement="_1-_2" >
            <di:waypoint x="39" y="115" />
            <di:waypoint x="75" y="46" />
            <di:waypoint x="136" y="112" />
          <bpmndi:BPMNEdge bpmnElement="_2-_3" >
            <di:waypoint x="136" y="112" />
            <di:waypoint x="240" y="240" />
            <di:waypoint x="282" y="110" />