ER ModelsERM ReferencesERM Anthologies
Model No.29
Short Citation (Junet 1987)
Year 1986
Special Name
Descendant of (Chen 1976)
ConstructsInherent Entity Type sg: weak
Relationship Type sg: sub-relation, generic-relation, sg/l: cardinality
Value Sets / Attributes sg/l: key, sg: multivalued-role, mandatory/not-mandatory roles
NewInventedAdapted
Included
BorrowedIncluded
Added
Syntactic Rules X
Semanticsformal
Focus g/t
Data Definition l
Data Manipulation
Remarks
CauseCitation...., the meaning of a role in the original E-R model is not powerful enough to capture some enhanced semantic of the real world (p. 305).
ContentExpressivenessstructure
Applicability
CorrectionX
Integration
Implementation(X)
Other
Alternative Publications
Binary Vector Structure/General [E1] 1
[E2] 1
[E3] i
[E4]
[E5]
[E6]
Structure/Integrity [E7] 1
[E8] i
[E9] f
[E10] 1
[E11] i
[E12]
[E13]
[E14] i
[E15]
[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 0.30
Data Model 0.56
Application 0.00
Domain Specifics 0.00
Partially Redundant Constructs Conjunctive Concepts W, S
Linked Concepts
Copyright(a) Susanne Patig, 2005