A Two-Level Programming Model Based on Spreadsheet and Data Flow Chart

This paper proposes a two-level programming model based on spreadsheet and data flow chart for end-user programming, which adopts spreadsheet-based top-down construction pattern and dataflow-based bottom-up modification pattern to compose mashup applications. The model can not only provide users with spreadsheet-like programming style, but also provide flexible modification operators for mashups to reduce the complexity of composing mashup applications.