Abstract of FKI-175-93
Title: Default Reasoning and the Qualitative Representation
of Spatial Knowledge
Authors: Daniel Hernandez
Category: Technical Report (Forschungsberichte Künstliche Intelligenz)
Abstract: This paper shows the close relationships between
qualitative representations and default reasoning.
These relationships are manifold: On the one hand,
qualitative representations and defaults can be
considered as alternate ways to cope with fuzzy or
incomplete knowledge. On the other hand, defaults and
their associated revision mechanisms are also needed
in the qualitative approach to handle the fact that
they are inherently under-determined. Furthermore, in
the case of spatial representations the structural
similarity between the representing and the
represented worlds prevents us from violating
constraints corresponding to basic properties of the
represented world, which would otherwise have to be
restored through revision mechanisms at great cost.
Keywords: qualitative representation, default reasoning,
constraint relaxation, topological relations,
representation of spatial knowledge.
Size: 14 pages
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