References for A URN Namespace for OASIS

Hi Folks,
I don't know if it will be useful, but I thought I would supply a couple
of references for A URN Namespace for OASIS
A URN Namespace for OASIS  http://tools.ietf.org/html/rfc3121
http://www.ietf.org/rfc/rfc3121.txt
My main question will be why we don't just use this established form?  Cheers, Rex