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Quote: RM/T uses characteristic and associative types to define cartesian aggregations, unconditional generalizations, and alternative generalizations

topics > all references > references c-d > QuoteRef: coddEF12_1979 , p. 411



Topic:
entity-relationship database model
Topic:
representing a relationship

Quotation Skeleton

Entities and their types [and subtypes] can be classified … which case they are called characteristic; (2) fill … (3) fill neither of the above roles, in … [RM/T uses these types to define cartesian aggregations, unconditional generalizations [via subtypes], and alternative generalizations.] …   Google-1   Google-2

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Additional Titles

Quote: in RM/T, associative entity types interrelate entities of other types; superordinate role
Quote: in RM/T, kernel entity types or sub-types are neither characteristic nor associative types
Quote: in RM/T, characteristic entity types describe entities of some other type; subordinate role

Related Topics up

Topic: entity-relationship database model (21 items)
Topic: representing a relationship (28 items)

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