File Header

All dotXSI files must begin with a header. The file header indicates the file format and its revision number.

Field | Size (bytes) | Contents | Description
Magic number | 4 | "xsi" | File type
Version/major number | 2 | 01 | Major version 1
Version/minor number | 2 | 03 | Minor version 3
Format type | 4 | "txt" | Text file
|  | "bin" | Binary file
Compression type | 4 | "zip" | Compressed file created by PKZIP
Float size | 4 | 0064 | 64-bit floats
| 4 | 0032 | 32-bit floats

Example

For example, dotXSI v5.0 files start with:

    xsi 0500txt 0032

Reading left to right, this indicates:

• dotXSI file format.

• Version 5.0.

• A text file.

• 32-bit floating-point values.

Autodesk Softimage v7.5