ASSIGN values from TEXT MAP to FIELDSET
You can assign a TEXT MAP directly to a FIELDSET. First, this clears the FIELDSET and then creates a field in the FIELDSET for each key in the TEXT MAP.
In the following example, the command clears the FIELDSET FieldSet and then creates the field FieldSet.A with the value B.
MAP TEXT text_map
ASSIGN text_map [ "A" ] := "B"
ASSIGN FieldSet := text_map