On 5/22/07, Matt Mahoney <[EMAIL PROTECTED]> wrote:

Link grammar has a website and online demo at
http://www.link.cs.cmu.edu/link/submit-sentence-4.html

But as I posted earlier, it gives the same parse for:

- I ate pizza with pepperoni.
- I ate pizza with a friend.
- I ate pizza with a fork.

which shows that you can't separate syntax and semantics.  Many grammars have
this problem.

Link grammar (similarily to CFG and most other approaches that don't
already do it) can be extended with feature structures to be unified
online in the run of the parser (leading to so called unification
grammars). Nothing stops you from putting semantical information into
these structures as long as it is monotonic.
(Of course you cannot machine-learn these structures out of pure air.)

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