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Concraft
Concraft is a morphosyntactic disambiguation library based on constrained conditional random fields [1].
Usage
A good example of how the library can be used is Concraft-pl, a morphosyntactic tagger for the Polish language.
References
[1] Jakub Waszczuk, "Harnessing the CRF complexity with domain-specific constraints. The case of morphosyntactic tagging of a highly inflected language.", in Proceedings of COLING 2012, Mumbai, India.