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Define the representation for a tag name. #256

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Jun 17, 2021
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Define the representation for a tag name. #256

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Define the representation for a tag.
briandealwis Mar 30, 2021
918840b
Update spec.md use length
briandealwis Jun 10, 2021
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6 changes: 5 additions & 1 deletion spec.md
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Expand Up @@ -137,11 +137,15 @@ Typically, the first step in pulling an artifact is to retrieve the manifest. Ho
To pull a manifest, perform a `GET` request to a URL in the following form:
`/v2/<name>/manifests/<reference>` <sup>[end-3](#endpoints)</sup>

`<name>` refers to the namespace of the repository. `<reference>` MUST be either (a) the digest of the manifest or (b) a tag name.
`<name>` refers to the namespace of the repository. `<reference>` MUST be either (a) the digest of the manifest or (b) a tag.
The `<reference>` MUST NOT be in any other format. Throughout this document, `<name>` MUST match the following regular expression:

`[a-z0-9]+([._-][a-z0-9]+)*(/[a-z0-9]+([._-][a-z0-9]+)*)*`

Throughout this document, `<reference>` as a tag MUST be at most 128 characters in length and MUST match the following regular expression:

`[a-zA-Z0-9_]+[a-zA-Z0-9._-]*`

The client SHOULD include an `Accept` header indicating which manifest content types it supports.
In a successful response, the `Content-Type` header will indicate the type of the returned manifest.
For more information on the use of `Accept` headers and content negotiation, please see [Content Negotiation](./content-negotiation.md)
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