|This article needs additional citations for verification. (February 2012)|
||It has been suggested that Ferret search library and KinoSearch be merged into this article. (Discuss) Proposed since May 2011.|
|Developer(s)||Apache Software Foundation|
|Stable release||4.6.0 / November 24, 2013|
|Type||Search and index|
|License||Apache License 2.0|
Apache Lucene is a free/open source information retrieval software library, originally created in Java by Doug Cutting. It is supported by the Apache Software Foundation and is released under the Apache Software License.
Doug Cutting originally wrote Lucene in 1999. It was initially available for download from its home at the SourceForge web site. It joined the Apache Software Foundation's Jakarta family of open-source Java products in September 2001 and became its own top-level Apache project in February 2005. Until recently,[when?] it included a number of sub-projects, such as Lucene.NET, Mahout, Solr and Nutch. Solr has merged into the Lucene project itself and Mahout, Nutch, and Tika have moved to become independent top-level projects.
Version 4.0 was released on 12 October 2012.
Features and common use
While suitable for any application which requires full text indexing and searching capability, Lucene has been widely recognized for its utility in the implementation of Internet search engines and local, single-site searching.
At the core of Lucene's logical architecture is the idea of a document containing fields of text. This flexibility allows Lucene's API to be independent of the file format. Text from PDFs, HTML, Microsoft Word, and OpenDocument documents, as well as many others (except images), can all be indexed as long as their textual information can be extracted.
- Apache Nutch — provides web crawling and HTML parsing
- Apache Solr — an enterprise search server
- ElasticSearch — an enterprise search server
- Compass — a Java Search Engine Framework
- DocFetcher — a multiplatform desktop search application
Lucene.NET is a port of Lucene written in C# and targeted at .NET Framework users. There are currently two variations of the software, differing in Generics support and a few bug fixes. The version that supports Generics has a lowercase "g" appended to the version name to distinguish between the two.
Regardless of generics support, all versions of Lucene.NET (with or without the "g") should be able to read and write index files from the corresponding version of Java Lucene with no issues.
- Hibernate search
- Sphinx (search engine)
- List of information retrieval libraries
- Information extraction
- Text mining
- eGranary Digital Library
- Lucene implementations
- "Better Search with Apache Lucene and Solr". 19 November 2007.
- McCandless, Michael; Hatcher, Erik; Gospodnetić, Otis (2010). Lucene in Action, Second Edition. Manning. p. 8. ISBN 1933988177.
- GNU/Linux Semantic Storage System
- Perner, Petra (2007). Machine Learning and Data Mining in Pattern Recognition: 5th International Conference. Springer. p. 387. ISBN 978-3-540-73498-7.
- Twitter uses Lucene
- Official website
- List of Lucene Ports (or Implementations) in Other Languages on the Apache wiki
- Introductory article with Java code for search (This page is on Internet Archive) on Wikipedia data
- An article with explanation and example implementation of Lucene.Net