Excel file and program structure

Question

I need to know for a school project how Excel works. I need to know exactly what structure is behind the Excel file and how Excel works with this file.

I know that Excel is a propriety of Microsoft, and it is not Open Source, so I know that I cannot find too much on this argument ... But anything that can help me understand how Excel works is useful.

If I cannot find something in Excel, I will try to look at the Open Office or Open Document format. Therefore, even some information about this will be really useful.

Thank you all

Answer 1

MS Office BIFF , microsoft.com, Office Open XML , ECMA , microsoft.com.

OpenDocument, Open Office OASIS

Answer 2

, .

excel - zip XML-. XML- Excel.

XML xl\ zip.

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