Bloomsbury glossary

[pippin_999]

Has anybody checked out the glossary at the Bloomsbury site?
http://www.bloomsbury.com/harrypotter/content.asp?sec=2&sec2=3

It's mostly stuff we already know but there are some interesting
little tidbits. Like Vampire -" Evil creature that roams the night 
feeding on the blood of living beings. Cannot go out in the daylight."
Lucius Malfoy is listed as a "former supporter of You-Know-Who" 
and "Metamorphmagi are rare and are usually born, but with hard 
work it is possible to learn the skill."

I suppose as this is official info, it counts as canon? or does it?

Pippin