RECORD-POSITION
The 
RECORD-POSITION function returns the character position of a data item in a 
record description, starting at 1. It can always be used where a numeric literal is allowed.
General Format
RECORD-POSITION OF Data-Name  | 
Syntax Rules
   2. Data-Name may be qualified.
   3. Data-Name may not be reference modified.
   4. If Data-Name is subordinate to an OCCURS clause, then it must be referenced with subscripting or indexing.
   5. If Data-Name refers to a table item, the value is computed from the first occurrence of that item.