Patent ID: 8224850

Claim:
A method comprising: receiving at a first server device a request for a condition based URI list (CBUL) regarding which of a plurality of users satisfies a plurality of conditions respectively relating to a plurality of user characteristics, the request being received from a first client device via a network; obtaining at the first server device a specification of the conditions; accessing at least one repository in which is stored information regarding the plurality of users to obtain at least some of the information, the information concerning the plurality of user characteristics of the plurality of users; making a determination as to which of the plurality of users satisfies the plurality of conditions; sending the CBUL regarding the determination for receipt by the first client device; receiving a re-evaluation request from the first client within a period of time subsequent to the sending of the CBUL; obtaining updated information concerning the plurality of user characteristics from the at least one repository; making an additional determination as to which of the plurality of users satisfies the plurality of conditions; and sending an updated CBUL regarding the additional determination for receipt by the first client device.