title: Dynamic target queries in OSGi with DS
body: <p>When I use a reference in DS I can specify a target that will allow me to narrow down which service instance I want.  The problem is that all the examples show static queries that must be done at code time.  Is there a way to do a dynamic query (maybe pull in a property from Configuration Admin)?</p>
  
  <p>If DS does not support this is there another OSGi dependency injection framework (blueprint, iPojo, etc) that will support this?</p>