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Концепция «мультикультурализма»: интегративные модели управления полиэтническими и поликультурными сообществами ; Multiculturalism as a Central Concept of Multiethnic and Polycultural Society Studies
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Array TFS storage for unification grammars
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Abstract:
Thesis (Master's)--University of Washington, 2012 ; Constraint-based grammar formalisms such as Head-Driven Phrase Structure Grammar (HPSG) model linguistic entities as sets of attribute-value tuples headed by types drawn from a connected multiple-inheritance hierarchy. These typed feature structures (TFSes) describe directed graphs, allowing for the application of graph-theoretic analyses. In particular, graph unification --the computation of the most general structure that is consistent with a set of argument graphs (if such a structure exists)--can be interpreted as expressing the satisfiability and combination functions for the represented linguistic entities, thus providing a principled method for describing syntactic elaboration. In competent natural language grammars, however, the graphs are typically large and numerous, and computational efficiency is a key engineering concern. This thesis describes a method for the storage of typed feature structures where each TFS comprises a self-contained, contiguous memory allocation with a tabular internal structure. Also detailed is an efficient unification algorithm for this storage mode. The techniques are evaluated in agree , a new managed-execution concurrent unification chart parser which supports both syntactic analysis (parsing) and surface realization (generation) within the framework of the DELPH-IN (Deep Linguistic Processing with HPSG Initiative) joint reference formalism.
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Keyword:
Computer science; Linguistics; typed feature structure; unification grammar
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URL: http://hdl.handle.net/1773/20770
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