Elements of File Formats

File Format
Name	Elements of File Formats
Ontology	Electronic File Formats Elements of File Formats

This section is for

• Common formats that make up only a small part of a file
• Ancillary knowledge that may be needed to help decode file formats

Integers

• Binary-coded decimal
• Ones' complement
• Two's complement
• Variable-length base-128

Floating point numbers

• DEC64
• IEEE floating point
• Posit
• Unum

Time formats

(see also Date and time formats)

• MS-DOS date/time
• Unix time (timestamp number)

Identifiers

• Domain name
  • Top-level domain
• FourCC
• GUID
• IANA character set name
• IETF language tag
• ISO 3166-1 country code
• UUID
• Windows Language Code Identifier

Other

• ANSI escape code
• Base2
• Bit order
• Emacs file variable
• Endianness (little-endian, big-endian)
• Shebang

See also

• Character encoding
• Compression
• Data type
• Date and time formats
• Digital Rights Management
• Encryption
• Error codes and messages
• Error detection and correction
• Naming and numbering systems
• Text-based data