Web applications are typically proprietary and incompatible technologies. We propose a solution towards device neutral interoperable applications based on a common model for XML document presentation. The proposed model features a stable core that enables stable browser implementations and a highly extensible upper layer to support new functionality without browser modifications. We summarize the problems of compound documents which are necessary for such a presentation model by separating their integration requirements according to their native support by a browser or not. We conclude by future directions and standardization requirements for generic, device independent applications and for a generic integration model for compound documents. \ud \u
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