Parallel on-line parsing in constant time per word


Sikkel, Klaas (1993) Parallel on-line parsing in constant time per word. Theoretical computer science, 120 (2). pp. 303-310. ISSN 0304-3975

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Abstract:An on-line parser processes each word as soon as it is typed by the user, without waiting for the end of the sentence. Thus, in an interactive system, a sentence will be parsed almost immediately after the last word has been presented.

The complexity of an on-line parser is determined by the resources needed for the analysis of a single word, as it is assumed that previous words have been processed already. Sequential parsing algorithms like CYK or Earley need O(n2) time for the nth word. A parallel implementation in O(n) time on O(n) processors is straightforward. In this paper a novel parallel on-line parser is presented that needs O(1) time on O(n2) processors.
Item Type:Article
Copyright:© 1993 Elsevier Science
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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