diff --git a/examples/collection-only/collection.json b/examples/collection-only/collection.json
index 9a8da7c35..58029b7cc 100644
--- a/examples/collection-only/collection.json
+++ b/examples/collection-only/collection.json
@@ -1,7 +1,9 @@
 {
   "type": "Collection",
   "stac_version": "1.0.0-rc.2",
-  "stac_extensions": [],
+  "stac_extensions": [
+    "https://stac-extensions.github.io/scientific/v1.0.1/schema.json"
+  ],
   "id": "sentinel-2",
   "title": "Sentinel-2 MSI: MultiSpectral Instrument, Level-1C",
   "description": "Sentinel-2 is a wide-swath, high-resolution, multi-spectral\nimaging mission supporting Copernicus Land Monitoring studies,\nincluding the monitoring of vegetation, soil and water cover,\nas well as observation of inland waterways and coastal areas.\n\nThe Sentinel-2 data contain 13 UINT16 spectral bands representing\nTOA reflectance scaled by 10000. See the [Sentinel-2 User Handbook](https://sentinel.esa.int/documents/247904/685211/Sentinel-2_User_Handbook)\nfor details. In addition, three QA bands are present where one\n(QA60) is a bitmask band with cloud mask information. For more\ndetails, [see the full explanation of how cloud masks are computed.](https://sentinel.esa.int/web/sentinel/technical-guides/sentinel-2-msi/level-1c/cloud-masks)\n\nEach Sentinel-2 product (zip archive) may contain multiple\ngranules. Each granule becomes a separate Earth Engine asset.\nEE asset ids for Sentinel-2 assets have the following format:\nCOPERNICUS/S2/20151128T002653_20151128T102149_T56MNN. Here the\nfirst numeric part represents the sensing date and time, the\nsecond numeric part represents the product generation date and\ntime, and the final 6-character string is a unique granule identifier\nindicating its UTM grid reference (see [MGRS](https://en.wikipedia.org/wiki/Military_Grid_Reference_System)).\n\nFor more details on Sentinel-2 radiometric resoltuon, [see this page](https://earth.esa.int/web/sentinel/user-guides/sentinel-2-msi/resolutions/radiometric).\n",
@@ -78,9 +80,11 @@
       "minimum": 6.78,
       "maximum": 89.9
     },
-    "sci:citation": [
-      "Copernicus Sentinel data [Year]"
-    ],
+    "sci:citation": {
+      "$schema": "http://json-schema.org/draft-07/schema#",
+      "type": "string",
+      "pattern": "Copernicus Sentinel data \\d{4}"
+    },
     "gsd": [
       10,
       30,