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Array TFS storage for unification grammars

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dc.contributor.advisor Bender, Emily M. en_US Slayden, Glenn C. en_US 2012-09-13T17:34:27Z 2012-09-13T17:34:27Z 2012-09-13 2012 en_US
dc.identifier.other Slayden_washington_0250O_10255.pdf en_US
dc.description Thesis (Master's)--University of Washington, 2012 en_US
dc.description.abstract 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 <italic>typed feature structures</italic> (TFSes) describe directed graphs, allowing for the application of graph-theoretic analyses. In particular, graph <italic>unification</italic>--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 <italic>agree</italic>, 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. en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.rights Copyright is held by the individual authors. en_US
dc.subject typed feature structure; unification grammar en_US
dc.subject.other Linguistics en_US
dc.subject.other Computer science en_US
dc.subject.other Linguistics en_US
dc.title Array TFS storage for unification grammars en_US
dc.type Thesis en_US
dc.embargo.terms No embargo en_US

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