ComponentRole

Describes the semantic role of a version component position within a scheme.

Drives predictable keyword behaviour across schemes. For example, version: breaking in a commit message resolves to the component(s) with Breaking role, regardless of which scheme is in use.

Each scheme declares a layout: IArray[ComponentRole] mapping positions to roles. For multiple same-role positions (e.g., PVP has two Breaking), role-based keywords resolve to the last position with that role. Users who need a specific position use the component name directly.