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  FGMOL 2001 Preliminary Version Classifying Classication

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by Rainer Osswald
http://pi7.fernuni-hagen.de/publications/../papers/osswald/classify.ps
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Abstract:

Dierent types of linguistic classication, ranging from simple inheritance hierarchies to systemic networks, are classied algebraically and order-theoretically. To this end, classications are reformulated as observational theories. Classications that do not involve disjunction correspond to Horn theories, whose generic universe ordered by specialization is known to be a Scott domain. Several subtypes of Horn theories, corresponding to simple inheritance with exclusions, are classied with respect to their domains. Systemic classication is shown to have a at domain. In particular, every nite systemic classication can be translated into a Horn theory. The innite case turns out to be more subtle since non-isomorphic observational theories may induce isomorphic specialization orders. 1

Citations

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95 The logic of typed feature structures. Cambridge Tracts – Carpenter - 1992
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10 Inclusion, disjointness and choice: The logic of linguistic classification – Carpenter, Pollard - 1991
5 and completeness – Sequents - 2000
2 Systemic classi and its eciency – Brew - 1991
2 The Horn subset of systemic networks – Calder - 1999