| http://www.w3.org/ns/prov#value | - The general construction and operation of a GUI event-driven system, such as Windows, is also known in the art: see, e.g., Petzold, C., Programming Windows, Second Edition, Microsoft Press, 1990. [0043] B. Preferred Interface [0044] Shown in FIG. 2A, a spreadsheet notebook interface of the present invention will now be described.
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