Use X-GNOME-Keywords for application search

[mart-e <me mart-e be>]

Hello,

I've found a reference about the line X-GNOME-Keywords in the .desktop 
files which seems to contain keywords while searching for an application.
http://mail.gnome.org/archives/gnome-i18n/2010-November/msg00096.html

I don't know if this key is still used (haven't found many reference 
about it) but I think it could be nice if Gnome-Shell used it.
Currently, applications react only to "Name" and "Comment" lines. So to 
add some keywords, we need to add theses words in the Comment line. This 
can lead to inconsistent sentences and the purpose of this key is not 
really to store keywords.

What do you think ?