> any other thoughts from people? I wonder if I am on the right track, but doesn't it sound very much like this problem would benefit very much from the biopython solution, where the parser only parses some parts speeding up the finding of updated ones? Elia ************************** tel: +44 1223 49 44 31 mobile: +44 7971 59 03 69 fax: +44 1223 49 44 68 **************************