Re: [Corpora-List] Perl reader for Treebank parse trees?

From: Yannick Versley (versley@sfs.uni-tuebingen.de)
Date: Tue Apr 18 2006 - 09:45:42 MET DST

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    Dear Philip,

    > Does anyone have a convenient perl subroutine or module that will
    > convert Treebank parse trees into internal perl data structures? I've
    > done a bit of Web searching looking for combinations of things like
    > "perl", "s-expression", "sexpr", etc. with no luck, but I'm thinking
    > such a thing must be out there....
    I know of (at least) two perl programs/modules where you could try to extract
    the needed functionality:
    the first is Sabine Buchholz' chunklink.pl program, available under
    http://ilk.uvt.nl/~sabine/chunklink/chunklink_2-2-2000_for_conll.pl
    (I think that taking the start_read and read_sentence subroutines together
    with the terminal, non_terminal and trace classes - don't let yourself be
    fooled by the 'package' keyword, this is perl and they're classes - should
    suffice),
    the second is the penn2negra.pl script from Michael Daum's DepSy (Dependency
    Synthesizer), which uses a Parse::RecDescent parser and is part of the
    software available at
    http://nats-www.informatik.uni-hamburg.de/view/Papa/PapaDownloads
    (I've attached it here for convenience, otherwise it's in the utils/ directory
    in the tarballs).

    For the record, I use python for my needs, although not NLTK but some modules
    I built from scratch.

    Best Regards,
    Yannick Versley 

    -- 
Yannick Versley
Seminar für Sprachwissenschaft, Abt. Computerlinguistik
Wilhelmstr. 19, 72074 Tübingen
Tel.: (07071) 29 77352

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