Conceptual Diagram Objects

PowerDesigner supports all the objects necessary to build conceptual diagrams.

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).