Abstract
The Associative Language Description model (ALD), a combination of locally testable and constituent structure ideas, has been recently proposed to overcome some criticisms relative to context-free languages. This approach is consistent with current views on brain organization and can conveniently describe typical technical languages such as Pascal or HTML. ALD languages are strictly enclosed in context-free languages but in practice the ALD model equals context-free grammars in explanatory adequacy. Moreover, it excludes mathematical sets based on counting properties that are never used in the definition of artificial languages. Many properties of ALD are still to be investigated. Here, a characterization of context free languages in term of ALD languages is proved and a new hierarchy in the ALD family is given.
Work partially supported by CNR-CESTIA.
Lecturer of Formal Languages, Università Svizzera Italiana
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Cherubini, A., Crespi Reghizzi, S., San Pietro, P. (2001). Some Structural Properties of Associative Language Descriptions. In: Theoretical Computer Science. ICTCS 2001. Lecture Notes in Computer Science, vol 2202. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45446-2_11
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DOI: https://doi.org/10.1007/3-540-45446-2_11
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