Range concatenation grammar (RCG) is a grammar formalism developed by Pierre Boullier [1] in 1998 as an attempt to characterize a number of phenomena of natural language, such as Chinese numbers and German word order scrambling, which are outside the bounds of the mildly context-sensitive languages.[2]
From a theoretical point of view, any language that can be parsed in polynomial time belongs to the subset of RCG called positive range concatenation grammars, and reciprocally.[4]
Though intended as a variant on Groenink's literal movement grammars (LMGs), RCGs treat the grammatical process more as a proof than as a production. Whereas LMGs produce a terminal string from a start predicate, RCGs aim to reduce a start predicate (which predicates of a terminal string) to the empty string, which constitutes a proof of the terminal strings membership in the language.
^Boullier, Pierre (Jan 1998). Proposal for a Natural Language Processing Syntactic Backbone(PDF) (Technical report). Vol. 3342. INRIA Rocquencourt (France).
^Pierre Boullier (1999). "Chinese Numbers, MIX, Scrambling, and Range Concatenation Grammars" (PDF). Proc. EACL. pp. 53–60. Archived from the original (PDF) on 2003-05-15.
^Eberhard Bertsch and Mark-Jan Nederhof (Oct 2001). "On the complexity of some extensions of RCG parsing" (PDF). Proceedings of the Seventh International Workshop on Parsing Technologies (Beijing). pp. 66–77.
^Laura Kallmeyer (2010). Parsing Beyond Context-Free Grammars. Springer Science & Business Media. p. 37. ISBN 978-3-642-14846-0. citing Bertsch, Nederhof (2001)[3]
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