Hi,
I'm a little bit stumped. You might find this easy. I'm trying to develop an
English parser and have come across a real ambiguity in English, on
which, for the time being, I just want to enforce simple right
associativity:
e.g. Recommending drinking while driving is dangerous.
(Is it referring to the person driving while they are recommending drinking,
or the person recommending drinking-during-driving?)
This is not a problem. Since they are both equally valid in English, for the
time being I just want to enforce right associativity (maybe later give a
user option to change the tree), but I cannot figure out how!! Here is the
grammar I want to make right-associative (simplified for your convenience):
grammar prep;
sentence: nounPhrase 'verb';
nounPhrase: 'Ving' complement? prepPhr?;
complement : nounPhrase 'noun'? ;
prepPhr: 'preposition' nounPhrase;
Ambiguous sentence example: "Ving Ving preposition Ving verb"
Ambiguity: "preposition" can be a prepPhr belonging to the first "Ving"
(nounPhrase) OR the second "Ving" (nounPhrase). I want prepPhr to always
belong to the last occurring 'Ving' (nounPhrase). So I want to
enforce, using the example sentence (right associativity):
sentence{
nounPhrase{
'Ving'
complement{
nounPhrase{
'Ving'
prepPhr{
'preposition'
nounPhrase{
'Ving'
}
}
}
}
}
'verb'
}
instead of
sentence{
nounPhrase{
'Ving'
complement{
nounPhrase{
'Ving'
}
}
prepPhr{
'preposition'
nounPhrase{
'Ving'
}
}
}
'verb'
}
while preserving the grammar.
Anybody have as easy idea how? Sorry if I sound newbie, I'm stumped.
Regards,
N
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to il-antlr-interest@googlegroups.com
To unsubscribe from this group, send email to
il-antlr-interest+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en
-~----------~----~----~----~------~----~------~--~---
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
