Coral: Corpus access in controlled language

Tobias Kuhn*, Stefan Höfler

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


In this paper, we present Coral, an interface in which complex corpus queries can be expressed in a controlled subset of natural English. With the help of a predictive editor, users can compose queries and submit them to the Coral system, which then automatically translates them into formal AQL statements.We give an overview of the controlled natural language developed for Coral and describe the functionalities of the predictive editor provided for it. We also report on a user experiment in which the system was evaluated. The results show that, with Coral, corpora of annotated texts can be queried more easily and more quickly than with the existing ANNIS interface. Our system demonstrates that complex corpora can be accessed without the need to learn a complicated, formal query language.

Original languageEnglish
Pages (from-to)187-206
Number of pages20
Issue number2
Publication statusPublished - Nov 2012
Externally publishedYes


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