Type of name or specification for physical and logical files (position 17)

Type a value in this position to identify the type of name or, for logical files, the type of specification. If you specify a name type, the name is specified in positions 19 through 28.

The valid entries for physical files are:
Entry
Meaning
R
Record format name
Blank
Field name
K
Key field name
Note: Specify only one R because a physical file can contain only one record format.
The valid entries for logical files are:
Entry
Meaning
R
Record format name
J
Join specification
Blank
Field name or select/omit AND condition
K
Key field name
S
Select field name
O
Omit field name
Related reference
Name for physical and logical files (positions 19 through 28)
JOIN (Join) keyword—join logical files only