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Xapian

Xapian

Xapian is an open source probabilistic information retrieval library. It is a full text search engine library for programmers.

The Xapian search engine library is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It implements the probabilistic model of information retrieval, and provides facilities for performing ranked free-text searches, relevance feedback, phrase searching, boolean searching, stemming, and simultaneous update and searching. It is highly scalable, and is capable of working with collections containing hundreds of millions of documents.

It supports a rich set of boolean query operators.

Xapian is written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C#, Ruby, Lua and Erlang.

 Xapian 1.2.20

Price
Free to download

Size
3.0MB
License

GNU GPL v2

Developer
Olly Betts, Hein Ragas, James Aylett, Sam Liddicott, Richard Boulton, Dan Colish

Website
xapian.org

System Requirements

Support:
Documentation, Mailing Lists, Twitter, SourceForge Project Page

Selected Reviews:

Features include:

  • Supports database files > 2GB - essential for scaling to large document collections
  • Transactions: if database update fails in the middle of a transaction, the database is guaranteed to remain in a consistent state
  • Simultaneous search and update, with new documents being immediately visible
  • Support for large databases: Xapian has been proven to be scalable to hundreds of millions of documents
  • Accurate probabilistic ranking: more relevant documents are listed first
  • Phrase and proximity searching - users can search for words occurring in an exact phrase or within a specified number of words, either in a specified order, or in any order
  • Relevance feedback, which improves ranking and can expand a query, find related documents, categorise documents etc
  • Structured Boolean queries, e.g. "race AND condition NOT horse"
  • Wildcard search, e.g. "wiki*"
  • Spelling correction
  • Synonyms
  • Omega, a packaged solution for adding a search engine to a web site or intranet. Omega can easily be extended and adapted to fit changing requirements
  • Faceted search - dynamically generate complete lists of category values which feature in matching documents
  • Supports Unicode (including codepoints beyond the BMP), and stores indexed data in UTF-8
  • Highly portable

Return to Search Engines for Big Data Home Page

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Last Updated Monday, April 20 2015 @ 02:37 PM EDT


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