title: Use existing field as id in elasticsearch
body: <p>Just started using elasticSearch today. I was wondering if it would be possible to set in some kind of global parameter to use a certain field within a document as the ID always?</p>
  
  <p>My JSON documents will always have it's own unique ID</p>
  
  <pre><code>{
    "Record ID": "a06b0000004SWbdAAG",
    "System Modstamp": "01/31/2013T07:46:02.000Z",
    "body": "Test Body"
  }
  </code></pre>
  
  <p>Here I would like to use Record ID as the ID field. </p>
  
  <p>Regards</p>