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Solr (pronounced "solar") is an open-source enterprise-search platform, written in Java.Its major features include full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features [2] and rich document (e.g., Word, PDF) handling.
Apache Solr is an enterprise search server with a REST-like API. It's highly scalable, adaptable, comprehensive, and capable of processing and handling large amounts of data. The Apache Solr / OFBiz integration not only speeds up searches, but also greatly enhances the search capabilities of OFBiz.
Blacklight is an open-source Ruby on Rails engine for creating search interfaces on top of Apache Solr indices. The software is used by libraries to create discovery layers or institutional repositories; by museums and archives to highlight digital collections; and by other information retrieval projects.
In information retrieval, Okapi BM25 (BM is an abbreviation of best matching) is a ranking function used by search engines to estimate the relevance of documents to a given search query. It is based on the probabilistic retrieval framework developed in the 1970s and 1980s by Stephen E. Robertson , Karen Spärck Jones , and others.
Lucene Core: a high-performance, full-featured text search engine library; Solr: enterprise search server based on the Lucene Java search library; Lucene.NET: a port of the Lucene search engine library, written in C# and targeted at .NET runtime users. MADlib: Scalable, Big Data, SQL-driven machine learning framework for Data Scientists
Samvera main components are Fedora Commons, Solr, Blacklight, and HydraHead (a Ruby on Rails plugin and gem, respectively). [1] Each Samvera implementation is called a "head". "Samvera" is Icelandic for "togetherness".
Web framework for building Semantic web apps in Java. It provides an API to extract data from and write to RDF graphs Apache Kafka: Stream processing platform Apache Log4j: Java logging framework - Log4j 2 is the enhanced version of the popular Log4j project. Apache Lucene: High-performance, full-featured text search engine library. Apache Mahout
Document Clustering Workbench added for easy experimenting with Carrot² clustering, radically simplified Java API, search results clustering web application re-implemented, user manual [5] available 2.1.0 August 2007 Document Clustering Server added for exposing clustering as a REST service 2.0.0 September 2006