Phil, yes "Hap" would be an acronym for Hapmap, which as I understand it is what Affy and the rest are using, where DnaPrint is using Admixmap identifying properties. Here again, I take liberty in understanding, not being a scientist and receiving info from the boards and DD. As I understand it, Tony is looking at the more isolated SNP where hapmap is targeting more grouped loci.. The definition has been bantered about, but I am pulling a blank to it's exact wording as age takes it toll. LOL I swear, it almost takes a linguist to keep up, even in general. haha