ER Models | ERM References | ERM Anthologies |
Model No. | 79 | |||
Short Citation | (Gandhi et al. 1994) | |||
Year | 1994 | |||
Special Name | LER (Leveled ER) | |||
Descendant of | (Chen 1976) | |||
Constructs | Inherent | Entity Type | sg: complex, c: aspect | |
Relationship Type | sg: is_part_of | |||
Value Sets / Attributes | sg/l: identifier, sg: multi-valed aspect | |||
New | Invented | Adapted | ||
Included | ||||
Borrowed | Included | |||
Added | ||||
Syntactic Rules | X | |||
Semantics | formal | |||
Focus | g | |||
Data Definition | ||||
Data Manipulation | ||||
Remarks | ||||
Cause | Citation | ... the current proposal overcomes ... [limitations of existing ER models] (p. 421). | ||
Content | Expressiveness | |||
Applicability | X | |||
Correction | X | |||
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 |