Unified File Container: Homogeneous Content Storage with Heterogeneous Display

File formats have a tendency to proliferate and the tools required to convert between formats tend to lag behind. In addition, fle conversion is often inadequate and information lossy. The Unifed File Container (UFC) is a framework for allowing existing fle formats to share content, structure, and presentation without necessarily using the same underlying fle format. Any proposed framework clearly needs to allow for modern functionality such as collaborative editing, undo/redo, version control, compound documents, object linking and embedding, document preservation, format obsolescence, cascading styles, and more. The UFC attempts to address or bypass most of these issues.