It would be helpful to either add an addProperty method to SequencerOutputMap or change the semantics of SequencerOutputMap.setProperty to append values instead of overwriting them. This would allow multiple sequencers (e.g., a JAR sequencer, an ESB JAR sequencer, a SOA Governance sequencer) to operate on the same input and write to the same output nodes while adding one or more mixin types per sequencer (i.e., JAR sequencer adds java:jar mixin type, SOA-G sequencer adds jboss:artifact mixin type, no conflicts).

There are, of course, other ways to solve this problem