title: Links vs References in Document databases
body: <p>I am confused with the term 'link' for connecting documents </p>
  
  <p>In OrientDB page <a href="http://www.orientechnologies.com/orientdb-vs-mongodb/" rel="nofollow">http://www.orientechnologies.com/orientdb-vs-mongodb/</a> it states that they use links to connect documents, while in MongoDB documents are embedded.</p>
  
  <p>Since in MongoDB <a href="http://docs.mongodb.org/manual/core/data-modeling-introduction/" rel="nofollow">http://docs.mongodb.org/manual/core/data-modeling-introduction/</a>, documents can be referenced as well, I can not get the difference between linking documents or referencing them.</p>