A git (24 passages, no note) repository, or a local (3 passages, no note) folder, declared in the configuration (note: Configuration) with its typing rules (note: Rule). Every entity (note: Entity)'s identifier (note: Identifier) starts with the name of its source (note: Source), and every occurrence (note: Occurrence) knows which source it came from.
Not to be confused with
The source of a link, which is the file, line and method a link (note: Link) was inferred from.