Revision control
++ <?xml version="1.0" encoding="UTF-8"?>
++ <scxml
++ xmlns="http://www.w3.org/2005/07/scxml"
++ version="1.0"
++ >
++ <script><!--
++ function isValidMedia() {
++ var m = _event.data.media
++ return (m + "").length > 0
++ }
++ <initial>
++ </scxml>