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Published in:
2009 | OriginalPaper | Chapter
Adaptable Grammars for Non-Context-Free Languages
Author : Henning Christiansen
Published in: Bio-Inspired Systems: Computational and Ambient Intelligence
Publisher: Springer Berlin Heidelberg
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We consider, as an alternative to traditional approaches for describing non-context-free languages, the use of grammars in which application of grammar rules themselves control the creation or modification of grammar rules. This principle is shown to capture, in a concise way, standard example languages that are considered as prototype representatives of non-context-free phenomena in natural languages. We define a grammar formalism with these characteristics and show how it can be implemented in logic programming in a surprisingly straightforward way, compared with the expressive power. It is also shown how such adaptable grammars can be applied for describing meta-level architectures that include their own explicit meta-languages for defining new syntax.