« Flexx: why do you assume that the second field of an semicolon-seperated file is meant? »
Umm.. Well because it looks like a CSV format? Experience seeing a bit of a problem and getting what the requirement is (a/k/a "getting 'all' the information from the customer" ;)?
And it appered that putting that first field in the regexp was more out of confusion as to how to "get to" the second field, something I do see often when someone learns how to use regular experessions. Along with too much use of .* to pull in fields, BTW, when "not the separator" ([^;]*) is often more correct, or even needed. Things get worse, once quoting is to be considered, of course.
But yeah, it was just an educated guess.