Remove artifact manifest

The artifact manifest does not confer any additional benefits beyond the
existing image manifest. Drop it for the sake of backward compatibility.

Signed-off-by: Jon Johnson <[email protected]>

Author: jonjohnsonjr

Makefile

@@ -30,7 +30,6 @@ DOC_FILES := \
 	descriptor.md \
 	image-layout.md \
 	manifest.md \
-	artifact.md \
 	image-index.md \
 	layer.md \
 	config.md \

artifact.md

@@ -55,13 +55,10 @@ The following fields contain the primary properties that constitute a Descriptor
 - **`artifactType`** *string*
 
   This OPTIONAL property contains the type of an artifact when the descriptor points to an artifact.
-  This is the value of `artifactType` when the descriptor references an [artifact manifest](artifact.md).
   This is the value of the config descriptor `mediaType` when the descriptor references an [image manifest](manifest.md).
 
 Descriptors pointing to [`application/vnd.oci.image.manifest.v1+json`](manifest.md) SHOULD include the extended field `platform`, see [Image Index Property Descriptions](image-index.md#image-index-property-descriptions) for details.
 
-Descriptors pointing to [`application/vnd.oci.artifact.manifest.v1+json`](artifact.md) SHOULD include the extended field `artifactType`.
-
 ### Reserved
 
 Extended _Descriptor_ field additions proposed in other OCI specifications SHOULD first be considered for addition into this specification.
@@ -205,7 +202,7 @@ In the following example, the descriptor indicates the type of artifact it is re
 
 ```json,title=Content%20Descriptor&mediatype=application/vnd.oci.descriptor.v1%2Bjson
 {
-  "mediaType": "application/vnd.oci.artifact.manifest.v1+json",
+  "mediaType": "application/vnd.oci.image.manifest.v1+json",
   "size": 123,
   "digest": "sha256:87923725d74f4bfb94c9e86d64170f7521aad8221a5de834851470ca142da630",
   "artifactType": "application/vnd.example.sbom.v1"

descriptor.md

@@ -35,7 +35,6 @@ For the media type(s) that this document is compatible with, see the [matrix][ma
     Implementations MUST support at least the following media types:
 
     - [`application/vnd.oci.image.manifest.v1+json`](manifest.md)
-    - [`application/vnd.oci.artifact.manifest.v1+json`](artifact.md)
 
     Also, implementations SHOULD support the following media types:
 
@@ -157,14 +156,9 @@ When the variant of the CPU is not listed in the table, values are implementatio
       }
     },
     {
-      "mediaType": "application/vnd.oci.artifact.manifest.v1+json",
+      "mediaType": "application/vnd.oci.image.index.v1+json",
       "size": 7682,
-      "digest": "sha256:601570aaff1b68a61eb9c85b8beca1644e698003e0cdb5bce960f193d265a8b7",
-      "artifactType": "application/example",
-      "annotations": {
-          "com.example.artifactKey1": "value1",
-          "com.example.artifactKey2": "value2"
-        }
+      "digest": "sha256:601570aaff1b68a61eb9c85b8beca1644e698003e0cdb5bce960f193d265a8b7"
     }
   ],
   "annotations": {

image-index.md

@@ -4,7 +4,6 @@ digraph G {
     {
       rank=same
       manifest [shape=note, label="Image manifest\napplication/vnd.oci.image.manifest.v1+json"]
-      artifact [shape=note, label="Artifact Manifest\napplication/vnd.oci.artifact.manifest.v1+json"]
     }
     config [shape=note, label="Image config JSON\napplication/vnd.oci.image.config.v1+json"]
     layer [shape=note, label="Layer tar archive\napplication/vnd.oci.image.layer.v1.tar\napplication/vnd.oci.image.layer.v1.tar+gzip\napplication/vnd.oci.image.layer.nondistributable.v1.tar\napplication/vnd.oci.image.layer.nondistributable.v1.tar+gzip"]
@@ -14,9 +13,5 @@ digraph G {
   imageIndex -> manifest [label="1..*"]
   manifest -> config [label="1..1"]
   manifest -> layer [label="1..*"]
-  artifact -> manifest [label="0..1"] [constraint = false];
-  artifact -> artifact [label="0..1"];
   manifest -> manifest [label="0..1"];
-  artifact -> imageIndex [label="0..1"]
-  artifact -> layer[label="0..*"]
 }

img/media-types.dot

@@ -13,7 +13,6 @@ The following media types identify the formats described here and their referenc
 - `application/vnd.oci.image.layer.nondistributable.v1.tar`: ["Layer", as a tar archive with distribution restrictions](layer.md#non-distributable-layers)
 - `application/vnd.oci.image.layer.nondistributable.v1.tar+gzip`: ["Layer", as a tar archive with distribution restrictions](layer.md#gzip-media-types) compressed with [gzip][rfc1952]
 - `application/vnd.oci.image.layer.nondistributable.v1.tar+zstd`: ["Layer", as a tar archive with distribution restrictions](layer.md#zstd-media-types) compressed with [zstd][rfc8478]
-- `application/vnd.oci.artifact.manifest.v1+json`: [Artifact manifest](artifact.md)
 
 ## Media Type Conflicts
 

media-types.md

@@ -17,7 +17,6 @@ The goal of this specification is to enable the creation of interoperable tools
 - [Image Index](image-index.md)
 - [Filesystem Layers](layer.md)
 - [Image Configuration](config.md)
-- [Artifact Manifest](artifact.md)
 - [Annotations](annotations.md)
 - [Conversion](conversion.md)
 - [Considerations](considerations.md)
@@ -54,7 +53,6 @@ The high-level components of the spec include:
 
 * [Image Manifest](manifest.md) - a document describing the components that make up a container image
 * [Image Index](image-index.md) - an annotated list of manifests
-* [Artifact Manifest](artifact.md) - a document describing the components that make up an artifact
 * [Image Layout](image-layout.md) - a filesystem layout representing the contents of an image
 * [Filesystem Layer](layer.md) - a changeset that describes a container's filesystem
 * [Image Configuration](config.md) - a document determining layer ordering and configuration of the image suitable for translation into a [runtime bundle][runtime-spec]

spec.md

@@ -54,7 +54,4 @@ const (
 
 	// MediaTypeImageConfig specifies the media type for the image configuration.
 	MediaTypeImageConfig = "application/vnd.oci.image.config.v1+json"
-
-	// MediaTypeArtifactManifest specifies the media type for a content descriptor.
-	MediaTypeArtifactManifest = "application/vnd.oci.artifact.manifest.v1+json"
 )