Specifies whether before values are present in the data.

delim.hasbefores={true|false}

The default is false. The parser expects to find before and after values of columns for all records if delim.hasbefores is set to true. The before values are used for updates and deletes, the after values for updates and inserts. The afterfirst property specifies whether the before images are before the after images or after them. If delim.hasbefores is false, then no before values are expected.

For example:

delim.hasbefores=true