Hi, 
  I'm in google wiki knowledge team and currently work on Parsoid.
  I found there are some diffs between 
http://www.mediawiki.org/wiki/Parsoid/MediaWiki_DOM_spec and real Parsoid output. 
  For example: RFC 1945   
in page:
   <a rel="mw:ExtLink/PMID"
   resource="http://purl.org/commons/html/pmid/20610307"
   href="//www.ncbi.nlm.nih.gov/pubmed/20610307?dopt=Abstract"
   about="#_:PMID-20610307-1234"
   class="external mw-magiclink-pmid">
  PMID 20610307
</a>
in Parsoid:
<a typeof="mw:ExtLink/RFC" href="//tools.ietf.org/html/rfc1945" rel="mw:ExtLink/RFC">RFC 1945</a></p>

   I have removed the "parsoid-data" and other global tags, but still a lot of diff.
   The page is updated several days ago, so is the released Parsoid  not newest?

Thanks
Feng Yi