User interaction is mostly based on forms. However, forms are restricted to alphanumerical data -the editing of geospatial data is not supported. This statement does not only hold for established form standards like HTML forms, but also for the new W3C standard XForms. XForms defines a declarative framework for using forms and processing form data. It can be used with a variety of XML host languages. In this paper, we present an extension to XForms (called XFormsGI) that provides control

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... s for entering new geometries, for modifying the properties of existing objects as well as for selecting geometric entities. As XForms, XFormsGI is declarative, thus avoiding script extensions. XFormsGI supports coordinate systems. Additionally, it can be used for capturing and displaying sensor data like GPS or for the measurements of distances or temperatures. A prototypical implementation has been integrated into a mobile SVG client running on a PDA.