Field help (EDSSTA) 

Status of the elementary or composite data.

Below is the meaning of the different values :

- Mandatory : the data is mandatory in all standard UNSM messages.

- Required : mandatory for this message.

- Dependent : mandatory as a function of the other data in the message.

- Advised : useful information.

- Optional : can be useful to the recipient but not necessary for the processing of the operation.

- Not used : the item of data will be ignored by the recipient.

The status defined at the level of the composite data is determined by the status of the elementary data from which it is composed.

Ex : elementary data with the status "Mandatory" belonging to an item of composite data with the status "Not used" will not be taken into account.