GrETEL 2.0

What is GrETEL?

GrETEL stands for Greedy Extraction of Trees for Empirical Linguistics. It is a user-friendly search engine for the exploitation of treebanks. It comes in two formats:

Example-based search

In this search mode you can use a natural language example as a starting point for searching a treebank [?] with limited knowledge about tree representations and formal query languages. [?]

XPath search

In this search mode you have to build the XPath query yourself. We strongly recommend to use the XPath search tool only when you are an experienced XPath user!

Please cite the following paper if you are using GrETEL for your research:

Liesbeth Augustinus, Vincent Vandeghinste, and Frank Van Eynde (2012). "Example-Based Treebank Querying" In: Proceedings of the 8th International Conference on Language Resources and Evaluation (LREC-2012). Istanbul, Turkey. pp. 3161-3167

GrETEL is developed at the Centre for Computational Linguistics (CCL). For questions or comments on the content of this website, or if you want to become a member of our user group, you can contact us at



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