data is mapped 1:1 [...] in the GVL <name of data [...] in the GVL <name of data
example, in a GVL [...] DatasourceOpcUaServer.UserConfigurationV1 [...] DatasourceOpcUaServer.UserConfigurationV1
types, such as GVL [...] : PLC_PRG.iVar , PLC_PRG.fb1 [...] FB1 ) Symbol Type
or GVL by means of a [...] _PRG.arrOfInts[3] , PLC_PRG.inst.arrOfBool[1
GVL object [...] : "Message 1
without the GVL name [...] {attribute 'pack_mode':='1