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2.1 File Structure

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This section specifies the overall structure of a file that conforms to this specification.

A file of the type specified by this document is an OLE compound file. A compound file (section 2.1.1) contains storages, streams (section 2.1.2), and substreams (section 2.1.3). Each stream or substream contains a series of binary records (section 2.1.4). Each binary record contains zero or more structured fields that contain the workbook data.