big tings

registry/schema-org/Duration.schema.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "schema:Duration",
+  "title": "Duration",
+  "description": "Quantity: Duration (use [ISO 8601 duration format](http://en.wikipedia.org/wiki/ISO_8601)).",
+  "type": "object",
+  "allOf": [
+    {
+      "description": "Quantities such as distance, time, mass, weight, etc. Particular instances of say Mass are entities like '3 kg' or '4 milligrams'.",
+      "$ref": "schema:Quantity"
+    }
+  ]
+}