Solr is a standalone enterprise search server with a web-services like API. It extends Lucene: Real schema, with numeric types, dynamic fields, unique keys Powerful extensions to the lucene query language Support for dynamic faceted browsing and filtering Advanced, configurable text analysis Highly configurable and user extensible caching Performance optimizations External configuration via xml An administration interface Monitorable logging Fast incremental updates and snapshot distribution XML and CSV/delimited-text update formats demo]]>