Field help (TFBCND) 

This field is used to enter a formula conditioning the entry of the current record.

The XML management rules require that the start and end tags are not generated if there is no value between the two tags.

In the event of XML element groups with optional values, this field, if it is not populated, prevents the creation of the record.

Entering a condition is not necessary for the tags with optional values (when the field Mandatory is set to 'No') if these tags are not directly included in an XML element group.