Merge branch 'prezi-4' into friday_edits

Author: tomcrane

source/presentation/4.0/example/05_fragment.json

@@ -62,7 +62,7 @@
                 "id": "https://iiif.io/api/presentation/4.0/example/05/annotation/bodies/koto-body",
                 "type": "TextualBody",
                 "value": "Koto with a cover being carried",
-                "language": "en",
+                "language": ["en"],
                 "format": "text/plain"
               },
               "target": {

source/presentation/4.0/example/06_specific_resource.json

@@ -62,14 +62,14 @@
                 "id": "https://iiif.io/api/presentation/4.0/example/06/annotation/bodies/koto-body",
                 "type": "TextualBody",
                 "value": "Koto with a cover being carried",
-                "language": "en",
+                "language": ["en"],
                 "format": "text/plain"
               },
               "target": {
                 "id": "https://iiif.io/api/presentation/4.0/example/06/resources/koto-sr",
                 "type": "SpecificResource",
                 "source": {
-                  "id": "https://iiif.io/api/presentation/4.0/example/06/page/p1/1",
+                  "id": "https://iiif.io/api/presentation/4.0/example/06/canvas/p1",
                   "type": "Canvas"
                 },
                 "selector": {

source/presentation/4.0/example/07_collection.json

@@ -1,4 +1,5 @@
 {
+    "@context": "http://iiif.io/api/presentation/4/context.json",
     "id": "https://iiif.io/api/presentation/4.0/example/07_collection.json",
     "type": "Collection",
     "label": { "en": [ "Top-level Collection" ] },

source/presentation/4.0/example/07_sub_collection.json

@@ -1,4 +1,5 @@
 {
+    "@context": "http://iiif.io/api/presentation/4/context.json",
     "id": "https://iiif.io/api/presentation/4.0/example/07_sub_collection.json",
     "type": "Collection",
     "label": {