A Ruby binding for the link-grammar library, a syntactic parser of English. See http://www.link.cs.cmu.edu/link/ for more information about the Link Grammar, and http://www.abisource.org/projects/link-grammar/ for information about the link-grammar library.
- Ruby 1.8.7 or 1.9.2
- link-grammar (version 4.7.0 or later) from the AbiWord project (http://www.abisource.com/projects/link-grammar/)
These instructions assume a UNIX or UNIX-like environment. I've built it on MacOS X, FreeBSD, and Ubuntu Linux. I'm not sure how to get this to build under Windows, as I don't have a Windows license with which to test it. Suggestions welcomed.
First, you'll need to install the Abiword link-grammar library that comes with this source (or download it yourself if you wish):
$ tar -xvzf link-grammar-4.7.1.tar.gz $ cd link-grammar-4.7.1 $ ./configure; make; sudo make install $ cd ..
Now build, test, and install the Ruby library:
$ rake $ sudo rake install_gem
If you've installed the link-grammar library someplace that isn't in your regular include path, you might have to tell the build system where to look:
$ rake -- --with-link-grammar-dir=/usr/local
Under MacOS X, unless you've taken extra steps to compile the link-grammar library as a universal binary, you'll probably also have to limit it to your machine's architecture:
$ ARCHFLAGS="-arch i386" rake -- --with-link-grammar-dir=/usr/local
require 'linkparser' dict = LinkParser::Dictionary.new( :screen_width => 100 ) sent = dict.parse( "People use Ruby for all kinds of nifty things." ) # => #<LinkParser::Sentence:0xcf8eb "LEFT-WALL people use Ruby for all kinds # of nifty things . RIGHT-WALL"/2 linkages/0 nulls> sent.subject # => "people" sent.verb # => "use" sent.object # => "Ruby" puts sent.constituent_tree_string # => # (S (NP People) # (VP use # (NP Ruby) # (PP for # (NP (NP all kinds) # (PP of # (NP nifty things))))) # .) puts sent.diagram # => # +-------------------------------Xp------------------------------+ # | +----MVp---+----Jp----+ +------Jp-----+ | # +----Wd---+--Sp--+--Os-+ | +-Dmc-+--Mp-+ +----A---+ | # | | | | | | | | | | | # LEFT-WALL people.p use.v Ruby for.p all kinds.n of nifty.a things.n .
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