ER ModelsERM ReferencesERM Anthologies
Model No.79
Short Citation (Gandhi et al. 1994)
Year 1994
Special Name LER (Leveled ER)
Descendant of (Chen 1976)
ConstructsInherent Entity Type sg: complex, c: aspect
Relationship Type sg: is_part_of
Value Sets / Attributes sg/l: identifier, sg: multi-valed aspect
NewInventedAdapted
Included
BorrowedIncluded
Added
Syntactic Rules X
Semanticsformal
Focus g
Data Definition
Data Manipulation
Remarks
CauseCitation... the current proposal overcomes ... [limitations of existing ER models] (p. 421).
ContentExpressiveness
ApplicabilityX
CorrectionX
Integration
Implementation
Other
Alternative Publications
Binary Vector Structure/General [E1] i
[E2] m
[E3] i
[E4]
[E5]
[E6]
Structure/Integrity [E7] 1
[E8] 1
[E9] 1
[E10] 1
[E11] i
[E12]
[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 H
Copyright(a) Susanne Patig, 2005