Metadata (or metainformation) is "data that provides information about other data",[1] but not the content of the data itself, such as the text of a message or the image itself.[2] There are many distinct types of metadata, including:
Descriptive metadata
The descriptive information about a resource. It is used for discovery and identification. It includes elements such as title, abstract, author, and keywords.
Structural metadata
Metadata about containers of data and indicates how compound objects are put together, for example, how pages are ordered to form chapters. It describes the types, versions, relationships, and other characteristics of digital materials.[3]
^Gonzalez-Perez C (2018). "Metainformation". In Gonzalez-Perez C (ed.). Information modelling for archaeology and anthropology: software engineering principles for cultural heritage (1st ed.). Springer Cham. pp. 181–189. ISBN978-3-319-72652-6.