I know what you mean: Semantic issues in Internet-scale publish/subscribe systems?

In recent years, the amount of information on the Internet has increased exponentially developing great interest in selective informa-tion dissemination systems. The publish/subscribe paradigm is particu-larly suited for designing systems for routing information and requests according to their content throughout wide-Area network of brokers. Cur-rent publish/subscribe systems use limited syntax content-based routing. Since publishers and subscribers are anonymous and decoupled in time, space and location, often over wide-Area network boundaries, they do not necessarily speak the same language of use the same data and language format. Consequently, adding semantics to current publish/subscribe sys-tems is important. In this paper we identify and examine the issues in developing semantic-Aware content-based routing for publish/subscribe broker networks.