Recipe #0064: a Canvas has multiple AnnotationPage

[2SC1815J]

In the recipe 0064, one Canvas has two AnnotationPage objects.

The manifesto.js library had not handled this case well.
IIIF-Commons/manifesto#86

Is there any reason not to write the Canvas as follows (one Canvas -> one AnnotationPage -> two Annotation objects) to achieve the intent of this recipe?

{
  "id": "https://iiif.io/api/cookbook/recipe/0064-opera-one-canvas/canvas/1",
  "type": "Canvas",
  "width": 1920,
  "height": 1080,
  "duration": 7278.46,
  "items": [
    {
      "id": "https://iiif.io/api/cookbook/recipe/0064-opera-one-canvas/canvas/1/annotation_page/1",
      "type": "AnnotationPage",
      "items": [
        {
          "id": "https://iiif.io/api/cookbook/recipe/0064-opera-one-canvas/canvas/1/annotation_page/1/annotation/1",
          "type": "Annotation",
          "motivation": "painting",
          "target": "https://iiif.io/api/cookbook/recipe/0064-opera-one-canvas/canvas/1#t=0,3971.24",
          "body": {
            "id": "https://fixtures.iiif.io/video/indiana/donizetti-elixir/vae0637_accessH264_low.mp4",
            "type": "Video",
            "format": "video/mp4",
            "height": 1080,
            "width": 1920,
            "duration": 3971.24
          }
        },
        {
          "id": "https://iiif.io/api/cookbook/recipe/0064-opera-one-canvas/canvas/1/annotation_page/1/annotation/2",
          "type": "Annotation",
          "motivation": "painting",
          "target": "https://iiif.io/api/cookbook/recipe/0064-opera-one-canvas/canvas/1#t=3971.24",
          "body": {
            "id": "https://fixtures.iiif.io/video/indiana/donizetti-elixir/vae0637_accessH264_low_act_2.mp4",
            "type": "Video",
            "format": "video/mp4",
            "height": 1080,
            "width": 1920,
            "duration": 3307.22
          }
        }
      ]
    }
  ]
}

[glenrobson]

We discussed this in the Cookbook authors meeting on the 6th of January. We discussed that both options are valid in the IIIF spec but agreed the suggestion of having 1 annotation page with 2 annotations was a more optimal notation of this use case.

We discussed multiple annotation pages would be useful when there is some choice the user needs to make on which ones to show which isn't the case with this example.