[tasklist] java compilation warnings window on XML files!

Hi,
It seems that there is some parsing of all files types.
I notices today when I opened an XML files that there was a warning
relating to a xml attribute with value PENDING, (not in a comment, but
part of the normal XML)
 
what file types should be processed?
What level of processing is done - I presume that there is just a text
scan (so the tab name is incorrect?)
should it scan XML files at all and if it does should it understand
comments?
 
Mike