| ER Models | ERM References | ERM Anthologies |
| Model No. | 2 | |||
| Short Citation | (dos Santos et al. 1980) | |||
| Year | 1979 | |||
| Special Name | ||||
| Descendant of | (Chen 1976) | |||
| Constructs | Inherent | Entity Type | r: type | |
| Relationship Type | r: type | |||
| Value Sets / Attributes | r: type, sg/l: role | |||
| New | Invented | Adapted | ||
| Included | ||||
| Borrowed | Included | type constructors: sum, product, correspondence (theory of data types) | ||
| Added | ||||
| Syntactic Rules | Different types are connected by a type constructor to form a new type. | |||
| Semantics | formalized | |||
| Focus | g | |||
| Data Definition | ||||
| Data Manipulation | e | |||
| Remarks | reference to (Smith/Smith 1977) | |||
| Cause | Citation | ... expressing the semantic contents and the semantic structure of the data base, ... natural expression of the real world (p. 103). | ||
| Content | Expressiveness | structure | ||
| Applicability | ||||
| Correction | ||||
| Integration | ||||
| Implementation | ||||
| Other | ||||
| Alternative Publications | ||||
| Binary Vector | Structure/General | [E1] | 1 | |
| [E2] | 1 | |||
| [E3] | i | |||
| [E4] | ||||
| [E5] | i | |||
| [E6] | ||||
| Structure/Integrity | [E7] | |||
| [E8] | ||||
| [E9] | ||||
| [E10] | m | |||
| [E11] | f | |||
| [E12] | ||||
| [E13] | ||||
| [E14] | i | |||
| [E15] | ||||
| [E16] | ||||
| Behavior | [E17] | f | ||
| [E18] | f | |||
| 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 | ||||