Help me understand the difference between oci:// and docker://, please

[lictw]

$ skopeo --insecure-policy copy --dest-tls-verify=false --multi-arch=all \
   --format=oci docker://busybox:latest \
   docker://localhost:5000/busybox:latest

it schema, it's API specification of the registry, right? why then it isn't a oci:// for OCI image? also why zot can't accept docker image, but accepts the docker schema? I'm confused.. Thanks in advance!

[rchincha]

This is a convention as specified in containers/image project and hence accepted in the community in general.
docker:// refers to a remote docker procotol or https://github.com/opencontainers/distribution-spec (with --format=oci)

There is no oci://
It is oci: which refers to a local on-disk OCI layout.