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Parsing with Tree Descriptions: a constraint-based approach
Author: Denys Duchier and Stefan ThaterEditor:
We describe a grammatical formalism based on tree descriptions and
develop a constraint-based treatment of parsing in that framework. We
introduce the language of electrostatic tree descriptions to write
lexical entries: these are tree descriptions using neutral, as well as
positively and negatively charged variables. We develop an appropriate
notion of model. We then extend the framework to disjunctive systems
of electrostatic descriptions, and we correspondingly extend the
notion of model. Then we show how the search for minimal models can be
realized by reduction to a CSP solvable by constraint programming and
we provide the full encoding in an axiomatic style.
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