Xapian
| Developer(s) | xapian.org |
|---|---|
| Stable release | 1.2.8 / December 13, 2011 |
| Operating system | Cross-platform |
| Type | Search and index API. |
| License | GNU General Public License |
| Website | http://xapian.org/ |
Xapian is an open source probabilistic information retrieval library, released under the GNU General Public License (GPL). It is a full text search engine library for programmers.
It is written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C#, Ruby, and Lua. Xapian is highly portable and runs on Linux, Mac OS X, FreeBSD, NetBSD, OpenBSD, Solaris, HP-UX, Tru64, IRIX, Microsoft Windows[1], GNU Hurd[2], and OS/2[3].
Xapian is designed to be a highly adaptable toolkit to allow developers to easily add advanced indexing and search facilities to their own applications.
A growing number of organisations and projects are known to be using Xapian including Debian, Gmane, Die Zeit, Delicious, MoinMoin, and One Laptop per Child.[4]
Contents |
[edit] Features
- 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.
- 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.
[edit] See also
[edit] References
- ^ Features of Xapian
- ^ Debian buildd success report for GNU Hurd
- ^ Freshmeat announcement for Xapian 1.0.6
- ^ Users of Xapian
[edit] External links
- http://xapian.org is the Xapian project website.
- Xappy is a set of Python bindings for Xapian.
- Flax is an open-source enterprise search engine based on Xapian.
- Recoll is a desktop search tool based on Xapian.
- Full Text Search options in Ruby using Xapian.
