ER ModelsERM ReferencesERM Anthologies
Model No.27
Short Citation (Dittrich et al. 1987)
Year 1986
Special Name CERM (Complex-Entity/Relationship Model)
Descendant of (Chen 1976)
ConstructsInherent Entity Type r: objects, sg: complex objects, c: versions
Relationship Type sg/l: min/max
Value Sets / Attributes sg/l: predefined domains
NewInventedAdapted
Included
BorrowedIncluded
Added
Syntactic Rules X
Semanticsprimarily informal
Focus g
Data Definition e
Data Manipulation e
Remarks
CauseCitation... [the ERM] lacks a notion of... [composite] objects and a set of operators capable of dealing with these aspects (p. 422).
ContentExpressivenessstructure, time
Applicability
Correction
Integration
Implementation
Other
Alternative Publications
Binary Vector Structure/General [E1] 1
[E2] 1
[E3] i
[E4]
[E5]
[E6]
Structure/Integrity [E7] m
[E8]
[E9] f
[E10] 1
[E11] 1
[E12] 1
[E13]
[E14] i
[E15]
[E16]
Behavior [E17]
[E18]
Application [E19]
[E20]
[E21]
[E22]
[E23]
[E24]
[E25]
[E26]
[E27]
Domain-Specifics [E28]
[E29]
[E30]
[E31]
[E32]
[E33]
Expressiveness Values Total 0.27
Data Model 0.50
Application 0.00
Domain Specifics 0.00
Partially Redundant Constructs Conjunctive Concepts S
Linked Concepts
Copyright(a) Susanne Patig, 2005