title: How to obtain previous baseline from stream
body: <p>I can retrieve latest baseline which is always recommended in my case using following command</p>
  
  <pre><code>"cleartool desc -fmt \"%[rec_bls]CXp\" stream:".$SourceStream."\@\\".$pvob
  </code></pre>
  
  <p>I want to retrieve second latest baseline.Is it possible to obtain previous baseline from a given stream using cleartool command? previous applied baseline on any given component will also works.I need this to get difference between two streams from different projects which can be done by following command.</p>
  
  <pre><code>"cleartool diffbl -elements baseline:".$LastComponentBaseline." stream:".$CurrentStream;
  </code></pre>