np-ferret

= Ferret

Ferret is a Ruby port of the Java Lucene search engine. (http://jakarta.apache.org/lucene/) In the same way as Lucene, it is not a standalone application, but a library you can use to index documents and search for things in them later.

== Requirements

• Ruby 1.8
• C compiler to build the extension. Tested with gcc, VC6 and VC2005

== Installation

If you have gems installed you can simply do;

gem install ferret

Otherwise, you will need Rake installed. De-compress the archive and enter its top directory.

tar zxpvf ferret-.tar.gz cd ferret-

Run the following;

$ rake ext $ ruby setup.rb config $ ruby setup.rb setup

ruby setup.rb install

These simple steps install ferret in the default location of Ruby libraries. You can also install files into your favorite directory by supplying setup.rb some options. Try;

$ ruby setup.rb --help

== Usage

You can read the TUTORIAL which you'll find in the same directory as this README. You can also check the following modules for more specific documentation.

• Ferret::Analysis: for more information on how the data is processed when it is tokenized. There are a number of things you can do with your data such as adding stop lists or perhaps a porter stemmer. There are also a number of analyzers already available and it is almost trivial to create a new one with a simple regular expression.

• Ferret::Search: for more information on querying the index. There are a number of already available queries and it's unlikely you'll need to create your own. You may however want to take advantage of the sorting or filtering abilities of Ferret to present your data the best way you see fit.

• Ferret::Document: to find out how to create documents. This part of Ferret is relatively straightforward. If you know how Strings, Hashes and Arrays work Ferret then you'll be able to create Documents.

• Ferret::QueryParser: if you want to find out more about what you can do with Ferret's Query Parser, this is the place to look. The query parser is one area that could use a bit of work so please send your suggestions.

• Ferret::Index: for more advanced access to the index you'll probably want to use the Ferret::Index::IndexWriter and Ferret::Index::IndexReader. This is the place to look for more information on them.

• Ferret::Store: This is the module used to access the actual index storage and won't be of much interest to most people.

=== Performance

We are unaware of any alternatives that can out-perform Ferret while still matching it in features.

== Contact

For bug reports and patches I have set up Trac here;

http://ferret.davebalmain.com/trac

Queries, discussion etc should be addressed to the mailing lists here;

http://rubyforge.org/projects/ferret/

Alternatively you could create a new page for discussion on the Ferret wiki;

http://ferret.davebalmain.com/trac

Of course, since Ferret was ported from Apache Lucene, most of what you can do with Lucene you can also do with Ferret.

== Authors

[David Balmain] Port to Ruby

[The Apache Software Foundation (Doug Cutting and friends)] Original Apache Lucene

== License

Ferret is available under an MIT-style license.

:include: MIT-LICENSE