Apache Lucene and Nutch

Lucene is a high-performance, full-featured text search engine written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform. Lucene is used by many proprietary and open Content Management Solutions, but also in many Enterprise Search and Enterprise 2.0 development projects.

Lucene is an open source project available for free download from the Apache Foundation. Find more information on Apache Lucene here.
Nutch is an open source web search engine basesd on Lucene. Nutch adds web-specific functionality like, for example, a crawler, a link graph plugin or parsers for HTML or other formats.

Nutch is a project from the Apache Foundation as well.It basically extends Lucene to be a complete Web Search engine. There is more information on Apache Nutch here.

Apache Lucene and Nutch are an effective base for almost any search oriented functionality for web applications. Wyona is working with Lucene and Nutch since many years and has built a comprehensive knowledge and a broad implementation experience for these technologies.

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