Logical Data Modeling - Key

> (Data|State) Management and Processing > Logical Data Modeling

1 - About

A key refers to a attribute, or a group of attributes, which assumes a unique value for:

A key is an identifier only for its local scope (ie inside a entity or relationship set). More … see Logical Data Modeling - Global Identifier (Fully Qualified Name, Canonical Form)


3 - Example

4 - Management

4.1 - List

4.2 - Data Type

An identifier data type must be able to hold any key value.

A common implementation of this data type is an integer (64 bit :))


5 - Reference