Treebank querying

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GrETEL is a query engine in which linguists can use a natural language example as a starting point for searching a treebank with limited knowledge about tree representations and formal query languages.

By allowing users to search for constructions which are similar to the example they provide, it aims to bridge the gap between traditional and computational linguistics. GrETEL was developed by the Centre for Computational Linguistics at the University of Leuven.


PaQu (Parse and Query) is a website for searching the Alpino and LassySmall treebanks. It has an intuitive search interface for simple queries, as well as support for XPath for advanced search. Registered users can also upload their own data for automatic annotation. Syntactic Profiling offers the possibility to search for a range of predefined linguistic constructions.