WURFL

The WURFL is an XML configuration file which contains information about capabilities and features of several wireless devices.

The main scope of the file is to collect as much information as we can about all the existing wireless devices that access WAP pages so that developers will be able to build better applications and better services for the users.

In terms of adoption, WURFL is today more of a standard than UAProf is.

Thank you Jérôme (ifeedyou) for the link.