Revision control
++ <?xml version="1.0" encoding="UTF-8"?>
++ <!-- orthogonal preemptions
++ here we have multiple interrupt conflicts, originating from d and a2.
++ -->
++ <scxml
++ datamodel="ecmascript"
++ xmlns="http://www.w3.org/2005/07/scxml"
++ version="1.0"
++ initial="b">
++
++ <parallel id="b">
++
++ <state id="c">
++ <transition event="t" target="a1"/>
++ </state>
++
++ <state id="d" initial="d1">
++ <state id="d1">
++ <transition event="t" target="d2"/>
++ </state>
++
++ <state id="d2"/>
++ </state>
++
++ <transition event="t" target="a2"/>
++
++ </parallel>
++
++ <state id="a1"/>
++
++ <state id="a2"/>
++
++
++ </scxml>
++
++
++
++
++