ER Models | ERM References | ERM Anthologies |
Model No. | 65 | |||
Short Citation | (Thalheim 2000) | |||
Year | 1991 | |||
Special Name | HERM+ | |||
Descendant of | ||||
Constructs | Inherent | Entity Type | sg: cluster, weak | |
Relationship Type | sg: min/max | |||
Value Sets / Attributes | sg: nested, key | |||
New | Invented | Adapted | integrity constraints, operations, type construction | |
Included | ||||
Borrowed | Included | |||
Added | ||||
Syntactic Rules | (1) Relationships connect relationships. (2) Integrity constraints/operations are connected to entity or relationship types. | |||
Semantics | formal | |||
Focus | t | |||
Data Definition | l | |||
Data Manipulation | l | |||
Remarks | ||||
Cause | Citation | [HERM] ... has a strong theoretical basis (p. 9). The modeling is more natural and can be applied in a simple manner (p. 9). The theory is applicable to practical needs (p. 10). The results of the design are much simpler than with other approaches (p. 10). The model is easy to understand, simple and comprehensible (p. 11). The model is capable to support sophisticated database design techniques (p. 11). | ||
Content | Expressiveness | |||
Applicability | X | |||
Correction | X | |||
Integration | X | |||
Implementation | X | |||
Other | ||||
Alternative Publications | (Thalheim 1999) | |||
Binary Vector | Structure/General | [E1] | 1 | |
[E2] | 1 | |||
[E3] | 1 | |||
[E4] | 1 | |||
[E5] | 1 | |||
[E6] | 1 | |||
Structure/Integrity | [E7] | 1 | ||
[E8] | 1 | |||
[E9] | 1 | |||
[E10] | 1 | |||
[E11] | 1 | |||
[E12] | 1 | |||
[E13] | i | |||
[E14] | i | |||
[E15] | 1 | |||
[E16] | 1 | |||
Behavior | [E17] | 1 | ||
[E18] | 1 | |||
Application | [E19] | |||
[E20] | ||||
[E21] | ||||
[E22] | ||||
[E23] | ||||
[E24] | ||||
[E25] | 1 | |||
[E26] | ||||
[E27] | ||||
Domain-Specifics | [E28] | |||
[E29] | ||||
[E30] | ||||
[E31] | ||||
[E32] | ||||
[E33] | ||||
Expressiveness Values | Total | 0.58 | ||
Data Model | 1.00 | |||
Application | 0.11 | |||
Domain Specifics | 0.00 | |||
Partially Redundant Constructs | Conjunctive Concepts | S | ||
Linked Concepts |