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The following page has been changed by DanLarkin:
http://wiki.apache.org/couchdb/HTTP_Document_API

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  {"ok": true, "id": "some_doc_id", "rev": "946B7D1C"}
  }}}
  
- To update an existing document, you also issue a ''PUT'' request. In this case, the JSON body must contain a ''_rev'' property, which lets CouchDB know which revision the edits are based on. If the revision of the document currently stored in the database doesn't match, then a ''412'' conflict error is returned.
+ To update an existing document, you also issue a ''PUT'' request. In this case, the JSON body must contain a ''_rev'' property, which lets CouchDB know which revision the edits are based on. If the revision of the document currently stored in the database doesn't match, then a ''409'' conflict error is returned.
  
  If the revision number does match what's in the database, a new revision number is generated and returned to the client.
  
@@ -192, +192 @@

  And here is the server's response if there is an update conflict (what is currently stored in the database is not revision ''946B7D1C'' of document ''some_doc_id'').
  
  {{{
- HTTP/1.1 412 Precondition Failed
+ HTTP/1.1 409 Conflict
  Date: Thu, 17 Aug 2006 05:39:28 +0000GMT
  Content-Length: 33
  Connection: close