ER ModelsERM ReferencesERM Anthologies
Model No.45
Short Citation (Lazimy 1990)
Year 1989
Special Name E2R (E-squared-R)
Descendant of (Chen 1976)
ConstructsInherent Entity Type X
Relationship Type sg: association, aggregation, class-subclass, membership
Value Sets / Attributes sg: derived, objective/goal
NewInventedAdaptedfunctions
Included
BorrowedIncluded
Added
Syntactic Rules (1) Relationships connect attributes. (2) Functions connect attributes.
Semanticsformalized
Focus t
Data Definition l
Data Manipulation
Remarksknowledge-based design
CauseCitation.. a need ... [to] represent semantically-rich knowledge as well as a variety of activities (p. 130).
ContentExpressivenessknowledge
Applicability
Correction
Integration
Implementation
Other
Alternative Publications
Binary Vector Structure/General [E1] 1
[E2] 1
[E3] 1
[E4]
[E5]
[E6]
Structure/Integrity [E7] m
[E8]
[E9] 1
[E10] m
[E11]
[E12]
[E13] a
[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 0.24
Data Model 0.44
Application 0.00
Domain Specifics 0.00
Partially Redundant Constructs Conjunctive Concepts S
Linked Concepts
Copyright(a) Susanne Patig, 2005