The crf-chain1-constrained package

[Tags:bsd3, library]

The library provides efficient implementation of the first-order, linear-chain conditional random fields (CRFs) with position-wise constraints imposed over label values.

It is strongly related to the simpler library where constraints are not taken into account and all features which are not included in the CRF model are considered to have probability of 0. Here, on the other hand, such features do not influence the overall probability of the (sentence, labels) pair - they are assigned the default potential of 0.

Efficient algorithm for determining marginal probabilities of individual labels is provided. The tagging is performed with respect to marginal probabilities.


Versions 0.1.0, 0.1.1, 0.1.2, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.3.2
Dependencies array, base (==4.*), binary, containers, data-lens, logfloat, monad-codec (==0.2.*), parallel, random, sgd (==0.3.*), vector, vector-binary [details]
License BSD3
Copyright Copyright (c) 2012 IPI PAN
Author Jakub Waszczuk
Category Math
Home page
Source repository head: git clone git://
Uploaded Tue Apr 16 18:17:55 UTC 2013 by JakubWaszczuk
Distributions NixOS:0.3.2
Downloads 1790 total (15 in the last 30 days)
0 []
Status Docs uploaded by user
Build status unknown [no reports yet]
Hackage Matrix CI




Maintainer's Corner

For package maintainers and hackage trustees