AppC has layers[0]. In fact, an ACI is just a layer.
While layers are codified into the OCI specification, the manifest system is flexible and allows for future extension. The main goal of OCI is to provide a specification for what is already widely deployed without introducing too many new concepts.
While layers are codified into the OCI specification, the manifest system is flexible and allows for future extension. The main goal of OCI is to provide a specification for what is already widely deployed without introducing too many new concepts.
[0]: https://github.com/appc/spec/blob/master/spec/aci.md#image-m...
Disclosure: OCI Maintainer, Docker Employee