add attachment metadata image

common/schemas/Attachment.openapi.yaml

@@ -18,6 +18,11 @@ components:
         - required:
             - name
             - "@type"
+          discriminator:
+            propertyName: "@type"
+            mapping:
+              Attachment: "#/components/schemas/Attachment"
+              AttachmentImage: "#/components/schemas/AttachmentImage"
           properties:
             id:
               type: string
@@ -80,3 +85,72 @@ components:
               type: string
               readOnly: true
               example: 8cf1bc0fca7f4158b8eb807be15fd7fd21bfe52d956ce3ede1511671c97dad61
+
+    AttachmentImage:
+      allOf:
+        - $ref: "./Attachment.openapi.yaml#/components/schemas/Attachment"
+        - properties:
+            "@type":
+              default: AttachmentImage
+              example: AttachmentImage
+            width:
+              description: The width of the image in pixels.
+              type: integer
+              format: int64
+              example: 800
+              readOnly: true
+            height:
+              description: The height of the image in pixels.
+              type: integer
+              format: int64
+              example: 600
+              readOnly: true
+            resolution:
+              description: The resolution of the image in DPI.
+              type: integer
+              format: int64
+              example: 72
+              readOnly: true
+            colorDepth:
+              description: The color depth of the image in bits.
+              type: integer
+              format: int64
+              example: 24
+              readOnly: true
+            thumbnail:
+              description: The thumbnail of the image.
+              type: string
+              format: base64
+              readOnly: true
+            thumbnailWidth:
+              description: The width of the thumbnail in pixels.
+              type: integer
+              format: int64
+              example: 80
+              readOnly: true
+            thumbnailHeight:
+              description: The height of the thumbnail in pixels.
+              type: integer
+              format: int64
+              example: 60
+              readOnly: true
+            geoLocation:
+              description: The geo location of the image.
+              readOnly: true
+              allOf:
+                - $ref: "./GeographicPoint.openapi.yaml#/components/schemas/GeographicPoint"
+            exif:
+              description: The EXIF data of the image.
+              type: object
+              readOnly: true
+              additionalProperties:
+                type: string
+              example:
+                {
+                  "Make": "Canon",
+                  "Model": "Canon EOS 5D Mark III",
+                  "ExposureTime": "1/60",
+                  "FNumber": "f/4.0",
+                  "ISOSpeedRatings": 3200,
+                  "DateTimeOriginal": "2019-12-31T23:59:59Z",
+                }