Metadata

Metadata is "data about data".

There are at two (or perhaps more? types of metadata:

• Structural metadata, about the design and specification of data structures or "data about the containers of data"

• Descriptive metadata about individual instances of application data or the data content

Metadata was traditionally in the card catalogs of libraries.

As information has become increasingly digital, metadata are also used to describe digital data using metadata standards specific to a particular discipline.

External Links

• Metadata @ Wikipedia