The National Archives
Search our website
  • Search our website
  • Search our records
Image of software box and CD PRONOM
Welcome (PRONOM  home page) About PRONOM Add an entry
Search Help - opens in a new window Information resources - opens in a new window

*Details: File format summary



Search by keyword Search by file format Search by PUID Search by software Search by vendor Search by lifecycles Search by Migration Pathway

Details for:

Save as... XML | CSV Printer friendly version
Go to:  Summary  |  Documentation  |  Signatures |  Compression  |  Character encoding  |  Rights  |  Reference files   Properties  


External signatures File extension: sdf
Internal signatures
Name Standard Data Format
Description Magic bytes, BOF, offset 0: G0 Magic bytes: 0x0D (Carriage Return) followed by 0x0A (Line Feed) followed by 0x1A (Substitute)
Byte sequences
Position type Absolute from EOF
Offset 0
Maximum Offset 0
Byte order  
Value 0D0A1A
Position type Absolute from BOF
Offset 0
Maximum Offset 3
Byte order  
Value 4730
Top of page Top of page
The National Archives Newsletter Icon

Send me The National Archives’ newsletter

A monthly round-up of news, blogs, offers and events.