This OPC UA Interface defines the content of an SrClass. The ISrClassType is formally defined in Table 8.

Table 8 – ISrClassType definition

Attribute	Value
BrowseName	ISrClassType
IsAbstract	True
References	NodeClass	BrowseName	DataType	TypeDefinition	Modelling Rule
Subtype of the BaseInterfaceType defined in OPC 10000-5
HasComponent	Variable	Id	Byte	BaseDataVariableType	Mandatory
HasComponent	Variable	Priority	Byte	BaseDataVariableType	Mandatory
HasComponent	Variable	Vid	UInt16	BaseDataVariableType	Mandatory
Conformance Units
BNM TSN Base Info

Id is a Byte and specifies the SRclassID in a numeric representation of the SR classes which is supported by a particular Bridge Port (see IEEE 802.1Q-2018, clause 35.2.2.9.2, SRclassID). Only Values between 0 and 7 shall be used.

Priority is a Byte and holds the Data Frame Priority (item a) in IEEE 802.1Q-2018 clause 35.2.2.8.5) value that will be used for streams that belong to the associated SR class. (see IEEE 802.1Q-2018, clause 35.2.2.9.3, SRclassPriority). Only Values between 0 and 7 shall be used.

Vid is an UInt16 and contains the SR_PVID (item i) in IEEE 802.1Q-2018 clause 35.2.1.4) that the associated streams will be tagged with by the Talker (see IEEE 802.1Q-2018, clause 35.2.2.9.4, SRclassVID).