Dublin Core

The Dublin Core, also known as the Dublin Core Metadata Element Set, is a set of fifteen "core" elements (properties) that can be used to describ resources in a standardized way.

The resources described using the Dublin Core may be digital resources (video, images, web pages, etc.) as well as physical resources such as books or works of art. 

Also see: https://www.dublincore.org/resources/userguide/