Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.

<?xml version="1.0" encoding="UTF-8" ?>
<rest-server>
    <!--  The port which the ArtifactDatabase (ArtifactServer) will bind to. -->
    <port>8181</port>
    <listen>localhost</listen>
</rest-server>