title: How to implement composite keys in Neo4J
body: <p>I need to ensure that a combination of more than one property values in all nodes is unique. How to do that in Neo4J.</p>
  
  <p>From Neo4J documentation available at <a href="http://docs.neo4j.org/chunked/milestone/transactions-unique-nodes.html" rel="noreferrer">http://docs.neo4j.org/chunked/milestone/transactions-unique-nodes.html</a>, it's possible to ensure uniqueness of one property. But what about combination of 2 or more.</p>