| 
|
Quote: RM/T inner kernel entity types are not subtypes of any other type; independently defined
topics >
all references >
references c-d >
Topic:
entity-relationship database model
Topic:
restricted and extended types
Topic:
type hierarchy
Quotation Skeleton
Entity type e_1 is said to be a … e_2. … Those kernel entity types that are not subtypes … independently of all other entity types. Google-1 Google-2
Copyright clearance needed for quotation.
Additional Titles
Quote: entities of a subtype of an entity type are necessarily entities of the parent type
Topic: entity-relationship database model (21 items)
Topic: restricted and extended types (34 items)
Topic: type hierarchy (18 items)