intable1,f,a,,,,name of the first table to be joined
intable2,f,a,,,,name of the second table to be joined
outtable,s,a,,,,name of output table
column1,s,a,,,,name of columns to join in first table
column2,s,a,,,,name of columns to join in second table
extrarows,s,h,neither,neither|first|both,,add unmatched rows from which table?
tolerance,s,h,0.0,,,tolerance used in testing for equality
casesens,b,h,yes,,,Case sensitivity flag
mode,s,h,"a",,,