From: Jurgen Vinju
To:
Date: Fri, 5 Nov 2004 13:09:59 +0100
Subject: PEM: Ralf Lämmel | A transformational approach to grammar adaptation | 13.07.00

 
From: pem (PEM moderator)
To: pem-noreply
Subject: PEM meeting | 13.07.00 | F0.09, UvA WINS 
Precedence: bulk
X-url: http://www.cwi.nl/~pem
Mime-Version: 1.0
Content-Type: text/plain;
        charset="iso-8859-1"

   Dear Environmentalists,

   This   week,   Ralf   will   share   with   us  his  work  on  Grammar
   Transformations.

   Please  note  that  this talk will be at the UvA! On the other side of
   the building! Please note!

   This announcement can be found at <http://www.cwi.nl/~pem>

             A transformational approach to grammar adaptation

   Date:    13.07.00
   Time:    10:00
   Venue:   F0.09, UvA WINS
   Speaker: Ralf Lämmel
   Title:   A transformational approach to grammar adaptation

   We  employ  grammar  transformations  for  the adaptation of grammars.
   Starting  from  a  few  fundamental  grammar transformations, and some
   supplementary  notions like focus, yielder and constraint we derive an
   operator   suite   for   grammar  adaptation.  Three  major  kinds  of
   adaptations  are  separated,  namely, transformations for refactoring,
   construction     and     destruction.     While     refactoring     is
   semantics-preserving   in   the   narrow  sense,  transformations  for
   construction  and  destruction  require  the  consideration of relaxed
   notions  of  semantics-preservation  based  on other grammar relations
   than  equality  of  generated languages. The consideration of (relaxed
   forms  of)  semantics-preservation is slightly complicated by the fact
   that we can not insist on reduced and terminated grammars.

   A  derived  transformational  approach to grammar improvement has been
   successfully applied in grammar recovery projects.
     _________________________________________________________________

   The  programming environment meetings are a forum for the presentation
   and  discussion  of  new  ideas,  ongoing and finished work. A typical
   meeting  addresses  a subject in the area of programming environments,
   program  generation, algebraic specification, term rewriting, parsing,
   etc.  A presentation ideally takes between 45 and 90 minutes. Meetings
   taking  longer  than 45 minutes are interrupted by a coffeebreak. Most
   Thursdays,  a  meeting is held which starts at 10:00 am. in one of the
   rooms at CWI/WINS. Exceptionally, dates or times may change.

   The    program    of    the    meetings    is    available   on   WWW:
   http://www.cwi.nl/~pem
     _________________________________________________________________