Russell, G., S. Warwick and J. Carroll (1990) `Asymmetry in parsing and generating with unification grammars: case studies from ELU'. In Proceedings of the 28th Annual Meeting of the Association for Computational Linguistics, Pittsburgh, USA. 205-211.
Recent developments in generation algorithms have enabled work in
unification-based computational linguistics to approach more closely
the ideal of grammars as declarative statements of linguistic facts,
neutral between analysis and synthesis. From this perspective,
however, the situation is still far from perfect; all known methods
of generation impose constraints on the grammars they assume.
We briefly consider a number of proposals for generation, outlining
their consequences for the form of grammars, and then report on
experience arising from the addition of a generator to an existing
unification environment. The algorithm in question (based on that of
Shieber at al. (1989)), though among the most permissive currently
available, excludes certain classes of parsable analyses.
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