Manual:Slot
Appearance
Slots are the building blocks for revisions: MediaWiki core and extensions define a certain number of roles that a piece of content can play, and a content associated with a certain revision in a certain role is referred to as a slot of that revision. (For example, a template page coulde have a main
slot holding the code of the template, and a documentation
slot holding the documentation.)
Slots have been introduced in MediaWiki 1.32 as part of Multi-Content Revisions. At this point in time, most interfaces understand them, but nothing actually uses them, except for the main
slot (which is the same thing as the content of the revision pre-1.32).
Slots are stored in the slots table.