If you specify ALL,
all columns are reset to their default values. In addition, any deleted
columns are restored with their default values. An editing statement,
such as RESET, must be specified after the database-description statements
when you create and load a PC file.
argument can be either the
SAS variable name or the positional equivalent from the LIST statement.
The positional equivalent is the number that represents the variable's
place in the data set.