Metadata

Metadata is extra non-critical information about the main contents of a file, or about the circumstances in which a file was created, etc.

Many, many formats contain data that could be considered to be metadata, but this page is only concerned with dedicated metadata formats which, for one reason or another, are best documented as separate formats.


 * Metadata formats related to archiving
 * Metadata formats related to audio and music
 * Metadata formats related to graphics
 * Metadata formats related to video


 * DFDL (Data Format Description Language) - a file format for describing file formats (how meta can you get?)
 * XML Schema Definition
 * XMDP (XHTML Meta Data Profiles)
 * XMP (Extensible Metadata Platform)

Links

 * Anyone Brushing Off NSA Surveillance Because It's 'Just Metadata' Doesn't Know What Metadata Is
 * Metadata Equals Surveillance