ER Models | ERM References | ERM Anthologies |
Model No. | 58 | |||
Short Citation | (Gogolla/Hohenstein 1991) | |||
Year | 1991 | |||
Special Name | EER | |||
Descendant of | different EER | |||
Constructs | Inherent | Entity Type | X | |
Relationship Type | sg: min/max,derived, functional | |||
Value Sets / Attributes | sg: multivalued, optional, derived, components, role, key | |||
New | Invented | Adapted | type construction | |
Included | ||||
Borrowed | Included | |||
Added | ||||
Syntactic Rules | Different input entity types are connected by type constructors to form separate output entity types [requirements]. | |||
Semantics | formal | |||
Focus | t | |||
Data Definition | l | |||
Data Manipulation | l | |||
Remarks | ||||
Cause | Citation | ... concentrating nearly all concepts of ... semantic data-models...., ... provide our extended ER model with a formal mathematical semantics (p. 369) | ||
Content | Expressiveness | |||
Applicability | ||||
Correction | X | |||
Integration | X | |||
Implementation | ||||
Other | ||||
Alternative Publications | (Engels et al. 1992/93) | |||
Binary Vector | Structure/General | [E1] | i | |
[E2] | 1 | |||
[E3] | 1 | |||
[E4] | 1 | |||
[E5] | 1 | |||
[E6] | 1 | |||
Structure/Integrity | [E7] | 1 | ||
[E8] | 1 | |||
[E9] | i | |||
[E10] | 1 | |||
[E11] | 1 | |||
[E12] | 1 | |||
[E13] | a | |||
[E14] | i | |||
[E15] | 1 | |||
[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 | 0.48 | ||
Data Model | 0.89 | |||
Application | 0.00 | |||
Domain Specifics | 0.00 | |||
Partially Redundant Constructs | Conjunctive Concepts | S | ||
Linked Concepts | O |