[plt-scheme] Parser Tools group-id for tokens

From: Paulo J. Matos (pocmatos at gmail.com)
Date: Tue Nov 25 14:54:19 EST 2008

Hi all,

I am wondering why do we need to specify a group id for tokens? What's
the usefulness of this group-id?

Regards,

-- 
Paulo Jorge Matos - pocmatos at gmail.com
Webpage: http://www.personal.soton.ac.uk/pocm


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