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Registries MUST accept refers to unknown manifests #341

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Sep 14, 2022
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Registries MUST accept refers to unknown manifests #341

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2 changes: 1 addition & 1 deletion spec.md
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Expand Up @@ -209,7 +209,7 @@ Pushing an object typically works in the opposite order as a pull: the blobs mak
A useful diagram is provided [here](https://github.com/google/go-containerregistry/tree/d7f8d06c87ed209507dd5f2d723267fe35b38a9f/pkg/v1/remote#anatomy-of-an-image-upload).

A registry MAY reject a manifest of any type uploaded to the manifest endpoint if it references manifests or blobs that do not exist in the registry.
A registry SHOULD accept a manifest with a `refers` field that references a manifest that does not exist.
A registry MUST accept an otherwise valid manifest with a `refers` field that references a manifest that does not exist, allowing clients to push a manifest and referrers to that manifest in either order.
When a manifest is rejected for these reasons, it MUST result in one or more `MANIFEST_BLOB_UNKNOWN` errors <sup>[code-1](#error-codes)</sup>.

##### Pushing blobs
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