The NetworkMessage is a container for DataSetMessages and includes information shared between DataSetMessages. This information consists of:
PublisherId Identifies the Publisher.
Security data Only available for encodings that support message security. The relevant information is specified in the message mapping.
Promoted fields Selected fields out of the DataSet also sent in the header.
Payload One or more DataSetMessages.
The payload, consisting of the DataSetMessages will be encrypted in accordance with the configured message security. Individual fields of a DataSetMessage can be marked as being “promoted fields”. Such fields are intended for filtering or routing and therefore are never encrypted. How and where the values for promoted fields are inserted depends on the NetworkMessage format and the used protocol. The NetworkMessage header is not encrypted to enable efficient filtering.