Metadata is a set of data that describes and gives information about other data and can be used for the purposes of discovery and identification.

Markup language

A computer language that uses tags to define elements within a document. It is human-readable, meaning markup files contain standard words, rather than typical programming syntax. XML is called the “Extensible Markup Language” since custom tags can be used to support a wide range of elements.


Serial number printed on the front of a smart card.