Information Retrieval
Listings
All links in this category.
Showing 1–9 of 9 editor-approved links.
University of Massachusetts research lab focused on efficient access to large, heterogeneous, distributed, text and multimedia databases.
Provider of intelligence and investigation management software for law enforcement, defence, national security and private sector organisations.
Searches all popular file types, with features including hit highlighting, natural language, fuzzy, phonic, boolean, proximity, field, numeric range.
Search software in 100% Java (J2EE) with parametric, natural language and full-text search capabilities.
A fulltext and free-text indexing and retrieval system that conforms to ANSI standard Z39.50. Helpful with structured data such as MARC records, and GILS records.
the ANSI/NISO Z39.50 (ISO 23950) information retrieval protocol standard, maintained at the Library of Congress.
A metasearch clustering engine for Web, Books, News.
This firm provides Lucene, Solr and Nutch consulting services. Focus is on vertical search and crawling.
It describes key issues in document ranking techniques based on the vector space model. Several TF*IDF variants are discussed. The cosine measure, recall and precision are introduced. [PS format]