• Gregory M. Kobele & Jens Michaelis. On the Form-Meaning Relations Definable by CoTAGs. (.pdf , 218K). To appear in Proceedings of the 11th International Workshop on Tree Adjoining Grammars and Related Formalisms (TAG+11), Paris, pp. 207-213. ACL, 2012.

Abstract

Adding cosubstitution to the classical TAG operations of substitution and adjunction, coTAGs have been proposed as an ``alternative conceptualization'' to resolve the tension between the TAG mantra of locality of syntactic dependencies and the seeming non-locality of quantifier scope. CoTAGs follow the tradition of synchronous TAGs (STAGs) in that they derive syntactic and semantic representations simultaneously as pairs. We demonstrate that the mappings definable by coTAGs go beyond those of ``simple'' STAGs. While with regard to the first component, coTAGs are weakly and strongly equivalent to classical TAGs, the second projection of the synchronously derived representations, can in particular be—up to a homomorphism—the non-tree adjoining language MIX(k), for any k ≥ 3.

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