Mashup Feeds: Continuous Queries Over Web Services

Mashups are web applications that combine information from several sources, typically provided through simple Web APIs (i.e. web services). Although the concept of mashups has become popular, current mashup applications are limited to very primitive information integration. The authors claim that this is partly due to the lack of a powerful description language for mashups. Mashups are usually written in procedural programming languages such as JavaScript, and the code rarely separates the user interface layer (dynamic HTML) and the data integration layer well. Web Service Composition has been studied and developed, including industry efforts on standard composition languages such as BPEL.