title: Is Solr 4.0 capable of using 'join" for multiple core?
body: <p>I notice Solr 4.0 has introduced 'join' feature for documents having relationships. this is great, however, I notice examples given by <a href="http://wiki.apache.org/solr/Join" rel="noreferrer">http://wiki.apache.org/solr/Join</a> are for single core which all documents are in single index.</p>
  
  <p>Does anybody know if I can use 'join' for multiple core? </p>