<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial, helvetica, sans-serif;font-size:12pt"><P>I guess that I stated my correct request in the wrong way. I just need a general simulator for context-dependent grammars that I can use to show to my students (by creating a toy grammar) how a language analyzer for a context-dependent grammar does works. I don't need any real context-dependent grammar for whatever language. </P>
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<P>I hope that this will give me some positive answer.</P>
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<P>Thanks for your time</P>
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<DIV>Stefano</DIV>
<DIV><BR> </DIV>Stefano Federici<BR>-------------------------------------------------<BR>Università degli Studi di Cagliari<BR>Facoltà di Scienze della Formazione<BR>Dipartimento di Scienze Pedagogiche e Filosofiche<BR>Via Is Mirrionis 1, 09123 Cagliari, Italia<BR>-------------------------------------------------<BR>Tel: +39 349 818 1955 Fax: +39 070 937 1870
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<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif">----- Messaggio originale -----<BR>Da: John F. Sowa <sowa@bestweb.net><BR>A: stefano federici <s_federici@yahoo.com><BR>Cc: corpora@uib.no<BR>Inviato: Giovedì 10 aprile 2008, 13:14:23<BR>Oggetto: Re: [Corpora-List] Sorry, my mistake, I need a Context-DEPENDENT grammar simulator<BR><BR>Stefano,<BR><BR>You are asking for somebody to hand you the Holy Grail:<BR><BR>> What I need is a context-DEPENDENT grammar simulator.<BR><BR>Chomsky's original definition of context sensitive grammar<BR>rules was very general, but not very practical for dealing<BR>with the kinds of context dependencies in natural languages<BR>(or even the much, much simpler programming languages).<BR><BR>The number of different kinds of context dependencies in NLs<BR>is enormous, and many different branches of linguistics (both<BR>theoretical and computational) have evolved to deal
with<BR>various aspects in an open-ended variety of complex ways.<BR><BR>At one extreme, any background knowledge that people have in<BR>their heads (or computers have in their knowledge bases) may<BR>be necessary for disambiguating a sentence in context.<BR><BR>At the other extreme, a table of names, references, symbols, etc.,<BR>is a highly efficient mechanism for keeping track of anaphoric<BR>references in NLs and symbol declarations in programming languages.<BR><BR>A complete list of all the kinds of context dependencies and how to<BR>describe, formalize, and implement them would touch on essentially<BR>every aspect of linguistics, logic, and knowledge representation.<BR><BR>In between, there are interconnections of the many different<BR>levels, such as semantic variations that may cause a puff of<BR>white noise to be interpreted as different phonemes, depending<BR>on what the listener was expecting.<BR><BR>I think that everybody who subscribes to
this list would like<BR>to see a simulator of all that. If anyone has such, please<BR>let us know.<BR><BR>John Sowa<BR><BR><BR></DIV><BR></DIV></div></body></html>