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QuoteRef: bracRJ10_1983
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ThesaHelp:
references a-b
Topic:
semantic networks
Topic:
classification
Topic:
knowledge representation
Topic:
default value
Topic:
problems with type inheritance
Topic:
representing a relationship
Topic:
types of hypertext links
Topic:
roles of a relationship
Topic:
fundamental concepts such as type, attributes, relationships are all the same
Topic:
problem of classifying information
Topic:
inheritance of properties
Reference
Brachman, R.J., "What IS-A is and isn't: an analysis of taxonomic links in semantic networks", Computer, October 1983, pp. 30-36. Google
30 ;;Quote: although IS-A links are widely used for classification, they have different meanings in different knowledge-representation systems
31 ;;Quote: using IS-A links for default properties is insufficient for complex concepts and interacts badly with cancellation
31 ;;Quote: IS-A links should be independent of inheritance; inheritance is a implementation issue
31 ;;Quote: the meaning of an IS-A link depends on understanding its nodes
32 ;;Quote: IS-A links may indicate subset/superset, a kind of, conceptual containment, role value restriction, or a set's characteristic type
32 ;;Quote: IS-A links between an individual and a generic indicate instantiation, set membership, predication, conceptual containment, and abstraction
33 ;;Quote: IS-A between sets typically indicates subsets; IS-A between predicates typically indicates that A follows from B
33 ;;Quote: use IS-A to make statements about the world; cleverly named nodes do not work; e.g., 'Indian-Elephant'
33 ;;Quote: with cancellation, Clyde the elephant could be just about anything, including a giraffe; the Elephant node is just a collection of properties
ThesaHelp: references a-b (396 items)
Topic: semantic networks (42 items)
Topic: classification (64 items)
Topic: knowledge representation (39 items)
Topic: default value (8 items)
Topic: problems with type inheritance (20 items)
Topic: representing a relationship (28 items)
Topic: types of hypertext links (19 items)
Topic: roles of a relationship (8 items)
Topic: fundamental concepts such as type, attributes, relationships are all the same (37 items)
Topic: problem of classifying information (41 items)
Topic: inheritance of properties (24 items)