CID
A CID is a content identifier: a stable identifier derived from the content of a file, directory, or serialized object.
In eqty_sdk, CIDs are one of the core building blocks of provenance. Assets, computation inputs and outputs, and many low-level statements are connected through CIDs. If the content changes, the CID changes too, which is what makes it useful for integrity and reproducibility.
Most users do not create CID objects directly very often. Instead, they usually get them from asset constructors such as Dataset.from_path(...), or from existing manifests and statements.