The MessageRepeatCount with DataType Byte defines how many times every NetworkMessage is repeated. The default value is 0 and disables the repeating.

The MessageRepeatDelay with DataType Duration defines the time between NetworkMessage repeats in milliseconds. The parameter shall be ignored if the parameter MessageRepeatCount is set to 0.

This Structure DataType is used to represent the datagram specific transport mapping parameters for WriterGroups. It is a subtype of the WriterGroupTransportDataType defined in 6.2.6.7.2.

The DatagramWriterGroupTransportDataType is formally defined in Table 133.

Table 133 – DatagramWriterGroupTransportDataType structure

Name	Type	Description
DatagramWriterGroupTransportDataType	Structure	Subtype of WriterGroupTransportDataType defined in 6.2.6.7.2.
MessageRepeatCount	Byte	Defined in 6.4.1.3.1.
MessageRepeatDelay	Duration	Defined in 6.4.1.3.2.

Its representation in the AddressSpace is defined in Table 134.

Table 134 – DatagramWriterGroupTransportDataType definition

Attributes	Value
BrowseName	DatagramWriterGroupTransportDataType
IsAbstract	False
Subtype of WriterGroupTransportDataType defined in 6.2.6.7.2.
Conformance Units
PubSub Parameters Datagram

The Address parameter contains the network address information for the communication middleware related to the WriterGroup. The different Structure DataTypes used to represent the Address are defined in 6.2.7.5.3.

The parameter shall be null if an address is not set at this level. If the parameter is set, it overwrites the Address on the PubSubConnection.

Selects the general category of QoS the WriterGroup requires. Further details are defined in 6.4.1.1.1.

The parameter shall be null or empty if no QoS related parameters are set.

The DatagramQos parameter contains QoS related parameters for the WriterGroup as array of TransmitQosDataType Structures. The abstract TransmitQosDataType is defined in 6.4.1.1.3. The concrete subtypes are used to represent different QoS settings that can be combined in the array.

The array shall not contain multiple instances of a concrete subtype e.g. transmit PriorityLabel entry.

The parameter shall be null or empty if no QoS related parameters are set.

The DiscoveryAnnounceRate with DataType UInt32 defines the interval in seconds used for cyclic sending of discovery announcement messages related to the WriterGroup.

The default value is 0 and defines that discovery announcement messages are only sent as response to discovery probe messages.

The Topic parameter with DataType String contains the unique name of the data stream produced by the WriterGroup within a Message Oriented Middleware.

A unique default name can be created by combining the PublisherId with the WriterGroupId using ‘.’ As separator.

This Structure DataType is used to represent the datagram specific transport mapping parameters for WriterGroups. It is a subtype of the DatagramWriterGroupTransportDataType defined in 6.4.1.3.3.

The DatagramWriterGroupTransportDataType is formally defined in Table 135.

Table 135 – DatagramWriterGroupTransport2DataType structure

Name	Type	Description	Allow Subtypes
DatagramWriterGroup‌Transport2DataType	Structure	Subtype of DatagramWriterGroupTransportDataType defined in 6.4.1.3.3.
Address	NetworkAddressDataType	Defined in 6.4.1.3.4.	True
QosCategory	String	Defined in 6.4.1.3.5.
DatagramQos	TransmitQosDataType[]	Defined in 6.4.1.3.6.	True
DiscoveryAnnounceRate	UInt32	Defined in 6.4.1.3.7.
Topic	String	Defined in 6.4.1.3.8.

Its representation in the AddressSpace is defined in Table 136.

Table 136 – DatagramWriterGroupTransport2DataType definition

Attributes	Value
BrowseName	DatagramWriterGroupTransport2DataType
IsAbstract	False
Subtype of DatagramWriterGroupTransportDataType defined in 6.4.1.3.3.
Conformance Units
PubSub Parameters Datagram