{
  "header" : {
    "request" : "http://nbn-resolving.org/json/urn:nbn:de:bsz:21-opus-2952",
    "timestamp" : "2012-05-18T09:03:37.055+0200",
    "status_code" : 703,
    "message" : {
      "language" : "en",
      "text" : "urn:nbn:de:bsz:21-opus-2971"
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    "source" : "URN:NBN System Of The German National Library",
    "organisation" : "Deutsche Nationalbibliothek / German National Library"
  },
  "data" : {
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}