glossary entry: 5 Star Linked Data

I went to review the glossary again, and got stuck on the first item.

There's debate about whether Excel is "proprietary" -- I believe 
Microsoft claims it is not.  See:

    http://en.wikipedia.org/wiki/Proprietary_format#Controversial


And the fourth star is just wrong -- it could easily be read as allowing 
plain XML or plain HTML, since those are open standards from W3C.

Lets use the words on the mug, with some additional commentary.

       - s