SDRP — Unable able to express the direction of a port for a SWRadioComponent

Problem: Unable able to express the direction of a port for a
SWRadioComponent.

Proposed Solution: Add a direction property (TAG value) to the SWRadioPort
stereotype. Add direction tag value for SWRadioPort in Table 8-3 Interface
and Port Stereotypes.

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8.1.3.2 SWRadioPort
Description
The SWRadioPort defines a port that is associated with SWRAPIs.

Attributes
direction: DirectionType
The direction attribute indicates the usage direction of the port for a
component.

Types & Exceptions

<<enumeration>>DirectionType (IN, OUT, INOUT)
The DirectionType defines the direction values for a port.
IN means data and/or control is received by a port
OUT means data and/or control is sent by a port
INOUT means ata and/or control is received and sent by a port

Constraints
The SWRadioPort is only associated with SWRadioAPIs.
A port with IN direction can only be connected to a a port with IN or INOUT
direction.
A port with OUT direction can only be connected to a a port with OUT or
INOUT direction.
A port with INOUT direction can only be connected to a a port with IN, OUT
or INOUT direction.

Semantics
The Direction for a port can be graphically illustrated by a background
color for each of the Direction values.

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