GUIDs (Globally Unique Identifiers) (Tools/APIs) Contents Background Information Available Tools Note Work with GUIDs (Globally Unique Identifiers). Background Information A GUID (globally unique identifier) is a unique reference number used as an identifier. Available Tools GUIDENABLED class parameter Enables you to generate a GUID for each instance of the class. See Object Synchronization. %ExtentMgr.GUIDOpens in a new tab class This class is a persistent class that gives you access to GUID,OID value pairs. This class can be queried using SQL. This class presents examples.Availability: All namespaces. %GUIDOpens in a new tab class Provides utility methods for GUIDs. These include: %FindGUID() AssignGUID() And others Availability: All namespaces. %SYSTEM.UtilOpens in a new tab class Includes the following method: CreateGUID() Availability: All namespaces. Note The special variable $SYSTEM is bound to the %SYSTEM package. This means that instead of ##class(%SYSTEM.class).method(), you can use $SYSTEM.class.method().