Microsoft Compound File

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|thiscat=Microsoft Compound File
|thiscat=Microsoft Compound File
|locfdd={{LoCFDD|fdd000380}}, {{LoCFDD|fdd000392}}

Revision as of 02:16, 14 April 2015

File Format
Name Microsoft Compound File
LoCFDD fdd000380, fdd000392
PRONOM fmt/111

Microsoft Compound File is a complex container format used by some versions of Microsoft Office, and other Microsoft applications. It has features similar to those of a filesystem format.

It is also known as Compound File Binary File Format (CFBF or CFB), Microsoft Compound Document File Format, OLE Compound Document Format, OLE2 Compound Document Format, Composite Document File, etc.

The format was not publicly documented by Microsoft until 2008.

It is (or was?) inofficially known as LAOLA File Format.



Files begin with signature bytes D0 CF 11 E0 A1 B1 1A E1.

Identifying the specific document format is difficult. This is one of the few formats for which the file command resorts to a hard-coded identification algorithm (see readcdf.c).

Related formats

See Category:Microsoft Compound File.


Programs, libraries, and utilities


Editors' notes

TODO: Explain the relationship between Compound File format and the format/technology called COM Structured Storage (or OLE Structured Storage).

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