Last Updated on July 11, 2021
Lucene Geographic and Temporal Extensions (LGTE) is an information retrieval tool developed at Technical University of Lisbon which can be used as a search engine or as evaluation system for information retrieval techniques for research purposes. LGTE is the IR system behind DIGMAP. It is based on Lucense with a multinomial language modeling extension.
LGTE introduces several extensions for dealing with geographical and temporal information. The package also includes utilities for information retrieval evaluation, such as classes for handling CLEF/TREC (Cross Language Evaluation Forúm/Text Retrieval Conference) topics and document collections.
LGTE is a layer on the top of Lucene and provides an extended Lucene API to integrate several services like snippets generation, query expansion, and many others. A set of unit tests is provided.
Features include:
- Provides a simple and effective abstraction layer on top of Lucene.
- Supports integrated retrieval and ranking with basis on thematic, temporal and geographical aspects.
- Supports the Lucene standard retrieval model, as well as the more advanced probabilistic retrieval approaches.
- Supports Rochio Query Expansion.
- Provides a framework for IR evaluation experiments (e.g. handling CLEF/TREC topics).
- Includes a Java alternative to the trec_eval tool, capable of performing significance tests over pairs of runs.
- Includes a simple test application for searching over the Braun Corpus or the Cranfield Corpus.
- TREC/CLEF Evaluation Framework – a tool to index a collection, run a set of search topics and output the results in treckeval format.
- Provides Isolated Fields using different folders.
- Provides Hierarchic indexes through foreign key fields.
- Provides classes to parse documents using Yahoo PlaceMaker.
Website: code.google.com/archive/p/digmap/wikis/LuceneGeoTemporal.wiki
Support:
Developer: Technical University of Lisbon
License: New BSD License
LGTE is written in Java. Learn Java with our recommended free books and free tutorials.
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