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DataSets can be individual for a Publisher or they can be derived from a DataSetClass. Such a DataSetClass acts as template declaring the content of a DataSet. The DataSetClass is identified by a globally unique id – the DataSetClassId (see 6.2.2.2).

The DataSetMetaData is identical for all PublishedDataSets that are configured based on this DataSetClass. The DataSetClassId shall be in the corresponding field of the DataSetMetaData.

When all DataSetMessages of a NetworkMessage are created from DataSets that are instances of the same DataSetClass, the DataSetClassId of this class can be provided in the NetworkMessage header.