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Journal of the ACM
Article . 1968 . Peer-reviewed
License: https://www.acm.org/publications/policies/copyright_policy#Background
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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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Article . 1967 . Peer-reviewed
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Indexed Grammars—An Extension of Context-Free Grammars

Indexed grammars - an extension of context-free grammars
descriptionPublicationkeyboard_double_arrow_right Article , Conference object 01 Jan 1967 English Publisher:Association for Computing Machinery (ACM)Journal:Journal of the ACM, volume 15, pages 647-671 (issn: 0004-5411, eissn: 1557-735X, Copyright policy )
Authors: Alfred V. Aho;

doi: 10.1145/321479.321488 , 10.1109/focs.1967.16

Indexed Grammars—An Extension of Context-Free Grammars

Abstract

A new type of grammar for generating formal languages, called an indexed grammar, is presented. An indexed grammar is an extension of a context-free grammar, and the class of languages generated by indexed grammars has closure properties and decidability results similar to those for context-free languages. The class of languages generated by indexed grammars properly includes all context-free languages and is a proper subset of the class of context-sensitive languages. Several subclasses of indexed grammars generate interesting classes of languages.

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Keywords

languages, automata, networks

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
296
Top 1%
Top 0.1%
Top 10%
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