Service role (UPDM - MODAF aliases)
A Service Role is a proprietary element that is required to model UPDM in Modeler.
Creation
To create a Service Role:
• From a Service Interface: right-click the Service Interface, point to New, point to MODAF, and then click Service Role.
On the Select Type dialog, create or select the Service Interface element that is the type of the Service Role, or create an untyped Service Role.
• From an SOV-2 Service Interface Specification:
◦ Click the Service Role button, and then click the owning Service Interface. On the Select Type dialog, create or select the Service Interface element that is the type of the Service Role, or create an untyped Service Role.
Service Role button, and then click the owning Service Interface. On the Select Type dialog, create or select the Service Interface element that is the type of the Service Role, or create an untyped Service Role.◦ Click the 
Composite Association button, click the owning Service Interface, and then click the Service Interface element that is the type of the Service Role.
Composite Association button, click the owning Service Interface, and then click the Service Interface element that is the type of the Service Role.• From an SOV-4c Service Interaction Specification:
Click the Service Role button, and then click in free space on the diagram. From the Type Selector dialog, create or select the Service Interface to use as a type for the Service Role you are creating, or create an untyped Service Role.
Service Role button, and then click in free space on the diagram. From the Type Selector dialog, create or select the Service Interface to use as a type for the Service Role you are creating, or create an untyped Service Role.From a Modeler pane, locate the Service Interface that is to be the type of the Service Role you are creating, and then drag that Service Interface to the diagram.
Appearance
When shown on an SOV-2 Service Interface Specification, a Service Role appears as follows:
When shown on an SOV-4c Service Interaction Specification, a Service Role appears as follows:
Relationships
There are no relationships that are of significant importance to a Service Role.
The following sections provide information about how a Service Role is used in the model.
Create a Service Role from
Create from a Service Role
Only the UPDM elements that can be created from all UPDM elements (Alias, Definition, Information and Metadata).
Shown on these diagrams, tables and matrices
In addition to the AV-2 Integrated Dictionary and TV-1 Standards Profile, which can show all UPDM elements:
UPDM writeable properties
The following writeable properties are available on the Service Role tab of a Service Role element's Property Pages:
• URI