University of Sussex
Browse
Download file
Download file
1/1
2 files

The equivalence of four extensions of context-free grammars

journal contribution
posted on 2023-06-07, 13:28 authored by K. Vijay-Shanker, David WeirDavid Weir
There is currently considerable interest among computational linguists in grammatical formalisms with highly restricted generative power. This paper concerns the relationship between the class of string languages generated by several such formalisms, namely, combinatory categorial grammars, head grammars, linear indexed grammars, and tree adjoining grammars. Each of these formalisms is known to generate a larger class of languages than context-free grammars. The four formalisms under consideration were developed independently and appear superficially to be quite different from one another. The result presented in this paper is that all four of the formalisms under consideration generate exactly the same class of string languages.

History

Publication status

  • Published

Journal

Mathematical Systems Theory / Theory of Computer Systems

ISSN

1432-4350

Issue

6

Volume

27

Page range

511-546

Department affiliated with

  • Informatics Publications

Full text available

  • Yes

Peer reviewed?

  • No

Legacy Posted Date

2006-11-21

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports