What is metadata

What is metadata?

Metadata, also known as intermediary data and relay data, is data describing data (data about data), mainly information describing data attributes (property), used to support such as Indicates storage location, historical data, resource search, file recording and other functions. Metadata is a kind of electronic catalog. In order to achieve the purpose of cataloging, it must describe and collect the content or characteristics of the data, thereby achieving the purpose of assisting data retrieval.

Dublin Core Metadata Initiative (DCMI) is an application of metadata. It was established in February 1995 by the International Library Computer Center (OCLC) and the National Center for Supercomputing Applications. A seminar co-sponsored by Supercomputing Applications (NCSA) invited 52 librarians and computer experts to jointly develop specifications and create a set of characteristics that describe electronic files on the Internet.

Metadata is information about the organization of data, data domains and their relationships. In short, metadata is data about data.

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