GrETEL stands for Greedy Extraction of Trees for Empirical Linguistics. It is a user-friendly search engine for the exploitation of syntactically annotated coropra or treebanks. If you are new to GrETEL we recommend you to take a look at the documentation.

GrETEL has two search modes:

Example-based search enables you to use a natural language example as a starting point for searching a treebank. The query procedure consists of several steps, which allows you to define how similar the search results and the input example should be. In this way you can query a treebank without knowledge of the XPath query language, the tree representations, nor the exact grammar implementation used for the annotation of the trees.

XPath search enables you to query a treebank by means of an XPath query. This search mode is intended for experienced XPath users, as you need to build the XPath query yourself.