GrETEL

GrETEL is a user-friendly query engine in which linguists can use an utterance as a starting point for searching a treebank for a linguistic phenomenon. Instead of a formal, technical query instruction, it takes a natural language example as input.

Overview

  • GrETEL stands for Greedy Extraction of Trees for Empirical Linguistics.
  • GrETEL is a user-friendly query engine in which linguists can use an utterance as a starting point for searching a treebank for a linguistic phenomenon. Instead of a formal, technical query instruction, it takes a natural language example as input. This provides a convenient way for novice and non-technical users to use treebanks with a limited knowledge of the underlying syntax and formal query languages.
  • By allowing linguists to search for constructions similar to the example they provide, GrETEL aims to bridge the gap between descriptive-theoretical and computational linguistics.
  • The example-based query procedure consists of multiple steps: 1) The user enters an example of the construction they are interested in. 2) The example is returned in the form of a matrix, in which the user specifies which aspects of this example are essential for the construction under investigation. This matrix is automatically converted in an XPath query, which can be manually edited or even written by the user. 3) The user chooses the corpus on which the query must be executed. 4) The query is executed on the selected corpus, and the matching constructions are presented to the user as a list of sentences, which can be downloaded. The user can also click on the sentences in order to visualize the results as syntax trees, in which the matching part of the tree is highlighted. 5) The results of the query can then be efficiently analysed through the use of a pivot table.
  • GrETEL enables search in the LASSY-SMALL and the CGN (Spoken Dutch Corpus) Treebanks (1 million tokens each), among other corpora.
  • GrETEL also allows users to upload their own corpus. The corpus is then automatically parsed with the Alpino parser, and can then be used for querying.
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GrETEL

GrETEL4 (fork from CCL-KULeuven)

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GrETEL

GrETEL4 (fork from CCL-KULeuven)

Version

Status

Programming language

Source code/data location

Links

Community

Acknowledgements

Development

Contact

General questions

Report a problem with this resource