+
+notes: >
+ If you set a data property beginning with (and longer than) "xml_retain" on
+ the service connected to this consumer where the data is a mlt_service
+ pointer, then the pointed at service will also be serialized before the
+ connected service. This can be useful, for example, to save a playlist as
+ a media bin along with a multitrack. You can serialize more than one of these
+ additional services by setting more than property, each with a unique key
+ beginning with "xml_retain".
+