Off the shelf discriminative reranking software

Question

Is there existing software for discriminative reranking, such as that used by the Charniak NLP parser, Shen, Sarkar, and Och's parser or Shen and Joshi's techniques? I'd like something that I can easily adapt for my own uses, which are similar to parse reranking.

Answer 1

Charniak-Johnson Reranking

The source code for the Charniak-Johnson (CJ) reranking parser is freely available, you can download a copy here.

The reranker is a separate code module that takes as input n-best lists of parses, so it's trivial to decouple it from the parsing front end.

SVM-rank

Alternatively, the package SVM-rank, from Thorsten Joachim's lab at Cornell, is a general purpose ranker. It might be easier to go with this package, if what you want to do deviates significantly from what's being done by the Charniak-Johnson parser.