Fangorn: a system for querying very large treebanks

Link: http://nltk.ldc.upenn.edu:9090/index

Intro: Fangorn is an open source tool for querying very large treebanks, built on top of Apache Lucene.  Fangorn implements the LPath linguistic path language, which has an XPath-like syntax along with linguistically motivated extensions.  Result trees are annotated with the query in order to show how the query matched the tree, and these annotations can themselves be modified and submitted as further queries.

Lucene stuffs

These days, I am trying to use Lucene for my own research purpose. I figure out here some stuffs that may be relevant and useful:

Lucene in general: http://lucene.apache.org
-> you can find out more detail on this site!

Lucene Index Toolbox (Luke): http://www.getopt.org/luke/
-> This tool is very helpful for us to deal with functionality of Lucene search engine. It supports index, document browsing, search, ... with graphical UI (cross-platform).

Great articles:

1) Summarization with Lucene: http://sujitpal.blogspot.com/2009/02/summarization-with-lucene.html

-> In this article, the author tried to implement his own summarizer based mainly on two simple summarization algorithms, namely Classifier4J (C4J) and Open Text Summarizer (OTS) using Lucene, an open-source source engine API.

2) Lucene Analyzer, Tokenizer and TokenFilter: http://mext.at/?p=26
-> how to use analyzer, tokenizer, filter in Lucene

3) Lucene Indexing and Document Scoring: (googling with the keyword "lucene indexing and document scoring")
-> contains some basic concepts and definitions in Lucene under comprehensive explanation.

4) Understanding Lucene Scoring: http://www.opensourcereleasefeed.com/article/show/understanding-lucene-scori

5) Lucene Query Syntax: http://lucene.apache.org/java/2_3_2/queryparsersyntax.html (replace the version "2_3_3" if you are using newer ones)

(to be continued ...)

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Cheers,
Vu