• From an Architectural Description or Service Description: right-click the Architectural Description or Service Description, point to New, point to NAF, point to System, and then click Function.

• From an Organization: right-click the Organization, point to New, point to NAF, and then click Function

• Implements relationships link a Function to the Operational Activity, Standard Operational Activity and Service Function elements it implements.

• Is Capable Of Performing relationships link a Function to elements that can perform the Function.

• Maps To Capability relationships link a Function to the Capability elements that are mapped to.

• A Function Action invokes a Function.

• A Resource Operation message represents a Function on an NSV-10c Resource Event-Trace Description

• URI