[news.eclipse.modeling.gmf] Drop-down menu for attribute acceptable valu

[Mojique <armacot@xxxxxxxxx>]

Hi all. I've already posted the same question but got no answer, perhaps
because i used a strange nick-name due to a misconfiguration in my
newsreader; so here i am again :)
An attribute of a diagram element is of an enumerated type, call it AnEnum;
that attribute can be accessed from the properties view only, and i'd like
a drop-down list of available values to be shown when the user acts to
change the attribute value. Is it possible? How can it be done? Where can i
gather some information about that? Please consider that i'm definitely a
newbie... thank you all :)

-- 
The wind in my heart
The dust in my head