The configuration text files contain a list of the fields to be included in each row.  More that one type of row can be included in a file so long as the first column contains the type of row and the remaining columns in that row correspond to the fields listed in the selected row type.  

Also, it is important that the files not include any characters not allowed in XML.  The most common are less than (<), greater than (>), and ampersand (&).
