Specify the number of rows from the data file to be scanned to determine the attributes of
variables
(columns) in the SAS data set. The attributes include type (such as numerical, character, and date) and length.
Once the attributes are decided, they are applied to the entire data file. The length of
character variables
is a main concern among attributes. If there is any row after the number specified having larger length than the determined length of the variable, it will be truncated.
Caution
: Large values of this option might slow down the import process.
