Protocol layer (UPDM - NAF aliases)
Creation
To create a Protocol Layer:
• From a Protocol: right-click the Protocol, point to New, point to NAF, and then click Protocol Layer.
On the Select Type dialog, create or select the Protocol element that is the type of the Protocol Layer, or create an untyped Protocol.
• From an NTV-2 Standards Definition:
◦ Click the Protocol Layer button, and then click the owning Protocol. On the Select Type dialog, create or select the Protocol element that is the type of the Protocol Layer, or create an untyped Protocol.
Protocol Layer button, and then click the owning Protocol. On the Select Type dialog, create or select the Protocol element that is the type of the Protocol Layer, or create an untyped Protocol.◦ Click the 
Composite Association button, click the owning Protocol, and then click the Protocol element that is the type of the Protocol Layer.
Composite Association button, click the owning Protocol, and then click the Protocol element that is the type of the Protocol Layer.You can also create Protocol Layer elements through the 
Association and 
Uni-Directional Association buttons.
Association and Uni-Directional Association buttons.• From an NTV-2 Protocol Layer Definition:
◦ Click the Protocol Layer button, and then click the owning Protocol or Protocol Layer. On the Select Type dialog, create or select the Protocol element that is the type of the Protocol Layer, or create an untyped Protocol.
Protocol Layer button, and then click the owning Protocol or Protocol Layer. On the Select Type dialog, create or select the Protocol element that is the type of the Protocol Layer, or create an untyped Protocol.If the Protocol that owns the NTV-2 Protocol Layer Definition is not shown on the diagram, create a Protocol Layer on that Protocol by clicking in free space.
◦ From an appropriate Modeler pane, locate the Protocol element that you want to use as the type of the Protocol Layer, and then drag that Protocol to the Protocol or Protocol Layer on the diagram.
If the Protocol that owns the NTV-2 Protocol Layer Definition is not shown on the diagram, create a Protocol Layer on that Protocol by dragging the type to free space on the diagram.
Appearance
When shown on an NTV-2 Standards Definition, a Protocol Layer appears as follows:
When shown on an NTV-2 Protocol Layer Definition, a Protocol Layer appears as follows:
Relationships
There are no relationships that are of significant importance to a Protocol Layer.
The following sections provide information about how a Protocol Layer is used in the model.
Create a Protocol Layer from
Protocol
Create from a Protocol Layer
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 NAV-2 Integrated Dictionary and NTV-1 Standards Profile, which can show all UPDM elements:
UPDM writeable properties
The following writeable properties are available on the Protocol Layer tab of a Protocol Layer element's Property Pages:
• URI