Open Source English Language Parser

Open Source English Language Parser

Post by Luc The Pe » Mon, 31 Oct 2005 06:09:53

I was wondering if there existed

A quality english language parser, which would be capible, with simple to
moderate modification, of converting all words to their base form (plurals
become singular - verbs are unconjugated, adjective endings drop off etc.)

A simple reverse dictionary will not work, because before a verb can be
unconjugated it needs to be identified as a verb. Otherwise the noun
"being" could become be!


Open Source English Language Parser

Post by Roedy Gree » Mon, 31 Oct 2005 16:07:04

On Sat, 29 Oct 2005 15:09:53 -0600, "Luc The Perverse"
< XXXX@XXXXX.COM > wrote, quoted or indirectly
quoted someone who said :

There was one featured on Star Trek NG episode 47.

Canadian Mind Products, Roedy Green. Java custom programming, consulting and coaching.


Open Source English Language Parser

Post by Ralf Calle » Mon, 31 Oct 2005 22:54:14

You ask for a language parser (going for the syntax of sentences), but
what you describe is aiming at the moprhology of words. Now it depends
on what you want. Do you really want the linguistic base form, as you
find it in human readable dictionaries? Then a lemmatizer can give you
the base form of a word, as well as telling you which form of the word
you have at hand. There should definetly be something in Java, as it is
a very common problem, implementations in different programming
languages are available for decades. Of course the lemmatizer might not
give you a unique information about a word, as for instance "run" could
be a verb as well as noun. A so called tagger could help you then,
reducing this ambiguity, based on the context of the word. It is also a
standard problem and a lot of implementations are around. A tagger might
still not give you a unique answer, but for most practical applications,
this might not be a problem.

If you just want to do some search, dictionary lookup etc., a stemmer
might be, what you are looking for. It reduces words not to the
linguistic base form, but to a stem, which is not necessarly actually an
english word. This would be the simplest solution, used for instance in
search engines. This has also been implemented by genererations of
computer linguists, so you might search for "stemmer Java" in Google and
find something you could use.


Open Source English Language Parser

Post by Luc The Pe » Tue, 01 Nov 2005 14:50:18

"Roedy Green" < XXXX@XXXXX.COM > wrote in

Next time the crew of the Enterprise is forced back to our time period, I
will see if I can go back with them to procure it. Until then I am forced
to use this inferior technology :(


"Just like humans, a Java thread cannot paint in its sleep." - Roedy Green