Logical Diagram Objects

PowerDesigner supports all the objects necessary to build logical diagrams.

Object

Tool

Symbol

Description

Domain

[none]

[none]

Set of values for which a data item is valid. See Domains (CDM/LDM/PDM).

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).

n-n Relationship



[LDM only] Named cardinality represented with an intermediary entity. See Relationships (CDM/LDM).

Inheritance



Relationship that defines an entity as a special case of a more general entity. See Inheritances (CDM/LDM).