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Different types of identifiers

In the context of a medium to large organization, users often have at least the following identifiers:

  1. An employee number.
  2. At least one network login ID.
  3. Possibly additional login IDs to a variety of applications.
  4. At least one e-mail address.

This document offers guidance to organizations regarding the management of these corporate user IDs.

Scope and uniqueness

An ID must uniquely identify a person within a defined scope.

For example, since no two users can have the same login ID on an application, the application can be thought of as an identification domain, within which each user has a unique ID.

Unique IDs commonly have a scope drawn from the following list of possibilities:

Scope

Examples
Single system or application

Active Directory domain, RAC/F security database.
Single organization

Employee number, standardized cross-application login ID
Sub-national

Driver's license, voter number.
National

Passport number, federal tax number.
Global

Fully qualified e-mail address.

In general, the scope over which an ID is unique can be expanded by appending the context where it was defined. This can be illustrated with some additional examples:

Original scope

Example

Append

New scope

Example
Single system

JSMITH

Application name

Organization

JSMITH@App01
Single organization

JSMITH

Organization name

Global

JSMITH@Acme.com
State/province

DL 1341135-013

Jurisdiction

National

DL 1341135-013@NewYork
National

QC0318876

Country code

Global

QC0318876 from Canada

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