Terrier - Terabyte Retriever

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Terrier - Terabyte Retriever
Terrier - Terabyte Retriever

University: University of Glasgow

Sector(s): Information & Communications Technologies

About Opportunity:

Unlike other information retrieval systems, Terrier learns from empirical data and adapts to the user’s information needs and queries. The framework offers a modular API for querying, allowing the development of applications as diverse as experimenting with standard test collections, or the rapid deployment of Web, intranet and desktop search engines.

Terrier implements state-of-the-art indexing and retrieval functionalities, such as DFR and BM25F, as well as term dependence proximity models such as Markov Random Fields, and provides an ideal platform for the rapid development and evaluation of large-scale retrieval applications.

Terrier has an outstanding performance with respect to other current public technologies that aim to provide similar retrieval facilities and is readily deployable on large-scale collections of documents. Search results can be viewed in a handy desktop search application, or online from a JSP web interface.

Key Benefits:

  • High performance and scalable.
  • Capable of handling full-text indexing of large-scale document collections.
  • Provides multiple indexing strategies, such as multi-pass, single-pass and large-scale MapReduce indexing.
  • Implemented in cross-platform Java to ease portability between operating systems.
  • Multilingual – uses UTF internally, and can support corporas written in languages other than English.
  • Supports HTML, PDF, Microsoft Office and source code files, and is easily extensible for new document types.


  • Building Web, intranet and desktop search engines
  • Performing information retrieval experiments
  • Full-text searching
  • Multilingual information retrieval
  • Query performance prediction
  • Adaptive retrieval approaches
  • XML searching

IP Status:

A core version Terrier is currently being distributed as open source software, under the Mozilla Public License (MPL). It can be downloaded from http://ir.dcs.gla.ac.uk/terrier


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