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Library of language analyzers

The FreeLing package consists of a library providing language analysis services. FreeLing is designed to be used as an external library from any application requiring Natural Language Processing services (machine translators, intelligent web searchers, automatic summarizers, NL interfaces, etc.) Also, a simple main program is also provided as a basic interface to the library, which enables the user to analyze text files from the command line. Current version analyzes text in English, Spanish, Catalan, Galician, and Italian. New languages can be easily added if linguistic data are available.

  • Features:
  • Text tokenization
  • Sentence splitting.
  • Morphological analysis.
  • Named entity detection.
  • Date/number/currency/ratios recognition.
  • Physical magnitudes detection (speed, weight, temperature, density, etc.)
  • PoS tagging.
  • Named entity classification.
  • Chart-based shallow parsing.
  • WordNet based sense annotation
  • Dependency parsing.


User Manual in pdf and html at


Download version 4.0 (stable)
released on 15 May 2016

VCS Checkout

cvs -d checkout freeling



LicenseVerified byVerified onNotes
LGPLv2Ted Teah10 October 2006

Leaders and contributors

Lluis Padro Maintainer

Resources and communication

Audience Resource type URI
Help Homepage
Bug Tracking Homepage
Developer Forum
Support Forum

Software prerequisites

Kind Description
Weak prerequisite libcfg+
Required to use BerkeleyDB
Required to use libpcre
Required to build libcfg+
Required to build BerkeleyDB
Required to build libpcre

This entry (in part or in whole) was last reviewed on 26 February 2017.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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