You can create the following objects in a conceptual diagram:
|
Object |
Tool |
Symbol |
Description |
|---|---|---|---|
|
Domain |
[none] |
[none] |
Set of values for which a data item is valid. See Domains (CDM/LDM/PDM). |
|
Data Item |
[none] |
[none] |
Elementary piece of information. See Data Items (CDM). |
|
Entity |
 |
 |
Person, place, thing, or concept that is of interest to the enterprise. See Entities (CDM/LDM). |
|
Entity Attribute |
[none] |
[none] |
Elementary piece of information attached to an entity. See Attributes (CDM/LDM). |
|
Identifier |
[none] |
[none] |
One or many entity attributes, whose values uniquely identify each occurrence of the entity. See Identifiers (CDM/LDM). |
|
Relationship |
 |
 |
Named connection or relation between entities (ER modeling methodology). See Relationships (CDM/LDM). |
|
Inheritance |
 |
 |
Relationship that defines an entity as a special case of a more general entity. See Inheritances (CDM/LDM). |
|
Association |
 |
 |
Named connection or association between entities (Merise modeling methodology). See Associations and Association Links (CDM). |
|
Association Link |
 |
 |
Link that connects an association to an entity. See Associations and Association Links (CDM). |