Delivering document fragments from a web server to a server-deployed client application. The invention includes a data structure of a request for data including a namespace field, an event handler field, and a parameter field. A first process sends a populated data structure to a second process. The second process executes logic maintained by the second process and identified in the populated data structure to generate result data. The second process sends the result data to the first process for display to a user or other processing by the first process.