Sources track any avatar injection in ThingIn either from the API (/avatars/, /batch/avatars), or ThingIn injectors. A source holds metadata about the injection process used (API, IFC injector, generic injector...) the domains where this data source has been injected, the owner, the origin of the data, attached blobs, tags, and its creation date. Sources are created transparently when injecting any avatar.
The Source API's main usage is for administration purposes, and allows to keep track of data provenance, when managing avatars and domains.
For ThingIn users the Source API in combination with the Domain API (see https://wiki.thinginthefuture.com/e/en/public/Domain_of_an_avatar) can be useful: