Create data_schema.json

data_schema.json

@@ -0,0 +1,8 @@
+{
+  "commodities": [
+    { "name": "gold", "unit": "ounce" },
+    { "name": "iron_ore", "unit": "ton" },
+    { "name": "crude_oil", "unit": "barrel" }
+  ],
+  "sources": ["exchange", "port", "erp"]
+}