ER ModelsERM ReferencesERM Anthologies
Model No.58
Short Citation (Gogolla/Hohenstein 1991)
Year 1991
Special Name EER
Descendant of different EER
ConstructsInherent Entity Type X
Relationship Type sg: min/max,derived, functional
Value Sets / Attributes sg: multivalued, optional, derived, components, role, key
NewInventedAdaptedtype construction
Included
BorrowedIncluded
Added
Syntactic Rules Different input entity types are connected by type constructors to form separate output entity types [requirements].
Semanticsformal
Focus t
Data Definition l
Data Manipulation l
Remarks
CauseCitation... concentrating nearly all concepts of ... semantic data-models...., ... provide our extended ER model with a formal mathematical semantics (p. 369)
ContentExpressiveness
Applicability
CorrectionX
IntegrationX
Implementation
Other
Alternative Publications (Engels et al. 1992/93)
Binary Vector Structure/General [E1] i
[E2] 1
[E3] 1
[E4] 1
[E5] 1
[E6] 1
Structure/Integrity [E7] 1
[E8] 1
[E9] i
[E10] 1
[E11] 1
[E12] 1
[E13] a
[E14] i
[E15] 1
[E16] 1
Behavior [E17]
[E18]
Application [E19]
[E20]
[E21]
[E22]
[E23]
[E24]
[E25]
[E26]
[E27]
Domain-Specifics [E28]
[E29]
[E30]
[E31]
[E32]
[E33]
Expressiveness Values Total 0.48
Data Model 0.89
Application 0.00
Domain Specifics 0.00
Partially Redundant Constructs Conjunctive Concepts S
Linked Concepts O
Copyright(a) Susanne Patig, 2005