Metadata
A metadata is a data type that provides descriptive information about other data. In other words, metadata is information that describes the characteristics, properties or context of the data itself. Metadata are used to better organise, manage, search and understand data, facilitating their interpretation and use by systems and users.
Here are some examples:
- Database: In database management systems, metadata can describe the structure of tables, field names, data types and relationships between tables.
- Web: On websites, metadata can be embedded in HTML code to describe the title of the page, keywords, language used and other useful information for search engines and users.
- Video, music, photographs: In these files, metadata may include information on the duration, resolution, codec used, author, date and other details related to the content.