specifies the structure file ID containing a structure definition
(or mapping) of the fields in the GETMAINed storage area.
Structures
are made up of records in the following format: fieldname location
length type, where:
- fieldname
- specifies a 1 to 12 character symbolic name of the field.
- location
- specifies the position in structure that this field starts (the
first position is 1).
- length
- specifies decimal length of this field in bytes.
- type
- specifies the field data type: C (character), F (fullword),
or H (halfword).