| Field | Basic type | Byte Length |
| Event.EmitterONo.ONo | OcaUint32 | 4 |
| Event.EventID.DefLevel | OcaUint16 | 2 |
| Event.EventID.EventIndex | OcaUint16 | 2 |
| SourceConnector.IDInternal.Index | OcaUint16 | 2 |
| SourceConnector.IDExternal.Len | OcaUint16 | 2 |
| SourceConnector.IDExternal.Value | string | variable |
| SourceConnector.Connection.Secure | OcaBoolean | 1 |
| SourceConnector.Connection.StreamParameters.Value.DataSize | OcaUint16 | 2 |
| SourceConnector.Connection.StreamParameters.Value.Data | OcaUint8 | 1 * Count |
| SourceConnector.Connection.StreamCastMode | OcaEnumItem | 1 |
| SourceConnector.Connection.StreamChannelCount | OcaUint16 | 2 |
| SourceConnector.AvailableCodings | OcaList<{OcaUint16, {OcaUint16, string}, OcaUint32}> | (2 + Count * (6 + (2 + variable))) |
| SourceConnector.PinCount | OcaUint16 | 2 |
| SourceConnector.ChannelPinMap | OcaMap<OcaUint16, {OcaEnumItem, OcaUint16}> | (2 + 5 * Count) |
| SourceConnector.AlignmentLevel.Value.Value | OcaFloat32 | 4 |
| SourceConnector.CurrentCoding.CodingSchemeID.Value | OcaUint16 | 2 |
| SourceConnector.CurrentCoding.CodecParameters.Len | OcaUint16 | 2 |
| SourceConnector.CurrentCoding.CodecParameters.Value | string | variable |
| SourceConnector.CurrentCoding.ClockONo.ONo | OcaUint32 | 4 |
| ChangeType | OcaEnumItem | 1 |
| ChangedElement.PinMap.Value | bit | variable |
| ChangedElement.Connection.Value | bit | variable |
| ChangedElement.Coding.Value | bit | variable |
| ChangedElement.AlignmentLevel.Value | bit | variable |
| ChangedElement.AlignmentGain.Value | bit | variable |