Concept hierarchies are a useful form of background knowledge in that they allow raw data to be handled at higher, generalized levels of abstraction. Concept hierarchies can be provided by system users, domain experts or knowledge engineers.
Few major types of concept hierarchies are given below:
Few major types of concept hierarchies are given below:
- Schema hierarchies
- Set-grouping hierarchies
- Operation-derived hierarchies
- Rule-based hierarchies
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