Use the LISTFILE command to display the file specifications used
to build the file. This command lists descriptions of one or more
disk files at the level of detail you select. The level of display
detail is controlled by the option number or keyword parameter followingthe
file name.
A KSAM XL file does not have a unique file code. The file's
structure can be discerned from a LISTFILE display using option
1 (SUMMARY) or 2 (DISC). When displayed in this manner, the character
K is appended to the file type of a KSAM XL or a KSAM64 file to
distinguish them from standard files. A file code of KSAM identifies
a CM KSAM data file. A file code of KSAMK identifies a CM KSAM key
file. The following example displays summary information for a KSAM
XL file, a CM KSAM key file, a CM KSAM data file, a KSAM64 file,
and a standard file.
Two options display the key specifications for a KSAM file.
Option 5 (DATA) displays the file specifications and key data
for the file. Option 7 (UNIQUE) displays information that is unique to the file
type. For KSAM files, this displays the key data without the file specifications.
Figure 3-2 “File Information Display for a KSAM
XL File” provides an example of the
LISTFILE command using option 5 (DATA) and the display it generates.
For a KSAM file, the file specifications, as well as the key
information specified when the file was built, is displayed. (Note
that the keyword DATA could have replaced the option number 5 in
the LISTFILE request in the preceding example.) This display could
be abbreviated to display only the key data by using option 7 (UNIQUE) as shown in Figure 3-4 “Key Information Display for a KSAM XL
File”
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