title: What do the keys in Facebook's 'data-ft' JSON structure represent?
body: <p>On Facebook pages, many HTML elements include a 'data-ft' JSON object that is of the form:</p>
  
  <pre><code>data-ft='{
  "src":10,
  "sty":263,
  "actrs":"117307284966434",
  "targets":"117307284966434",
  "pub_time":1317143005,
  "fbid":"153538678072594",
  "qid":"5657092603540274768",
  "s_obj":5,
  "s_edge":1,
  "s_prnt":28,
  "ft_prefix":"feed_story.top_news",
  "ft_story_name":"StreamStoryCreateGeneric_ShareStreamContent_External_Other",
  "mf_story_key":"10150331666719785",
  "object_id":"153538678072594",
  "mf_objid":"153538678072594",
  "viewstate_id":"3201743663063655712",
  "sub_level":"mid",
  "sbj_type":"page",
  "is_boulder":"1",
  "authentic":1,
  "pageid":"117307284966434",
  "filter":"h",
  "pos":14
  }'
  </code></pre>
  
  <p>What do these keys represent?  Some of them are straightforward, such as <strong>'sty'</strong> as style, <strong>'actrs'</strong> is the Facebook-ID of the original poster, and <strong>'pub_time'</strong> is the UNIX epoch representation of the post date &amp; time.</p>
  
  <p>In particular, I am interested in understanding what the <strong>'authentic'</strong> key represents, as well as the <strong>'fbid'</strong> and <strong>'qid'</strong> values.</p>
  
  <p>Thanks for your insight, SO.</p>