Does Alerting have special Requirements for Query Languages?

Alerting Systems keep its users informed about new documents and events they are interested in. The power of such services depends on the expressiveness of the language used to define a user’s interest. In this paper, we show restrictions of existing languages and discuss additional language parameters. We will emphasize briefly the problem of different underlying time systems and propose a common profile structure that can serve as basis for a Profile Definition Language for Alerting.