The INCLUDE command
copies the entire contents of an external file into the active window.
If you do not specify
a
file-specification, then
SAS uses the filename from the previous FILE or INCLUDE command. If
you have not issued any FILE or INCLUDE commands, you receive an error
message indicating no default file exists.
In the Enhanced Editor,
if the filename is eight characters or less, the file extension of
.SAS is appended to
file-specification. No extension is appended for a
file-specification longer than eight characters.