Summary of XFD Fields

Fields defined with an OCCURS Clause are assigned unique sequential names. Fields without names are disregarded. When multiple fields occupy the same area, the compiler chooses only one of them unless you have a WHEN directive to distinguish them. To choose among multiple fields occupying the same area, the compiler:

• Preserves fields mentioned in KEY IS Phrase
• Discards group items unless USE GROUP is specified
• Discards REDEFINES Clause
• Uses the largest record if there are Multiple Record Definitions