Add $context/$flow/$global functions to jsonata

red/api/locales/en-US/jsonata.json

@@ -109,7 +109,18 @@
     "$spread": {
         "args": "object",
         "desc": "Splits an object containing key/value pairs into an array of objects, each of which has a single key/value pair from the input object. If the parameter is an array of objects, then the resultant array contains an object for every key/value pair in every object in the supplied array."
+    },
+
+    "$context": {
+        "args": "string",
+        "desc": "Retrieves a node context property."
+    },
+    "$flow": {
+        "args": "string",
+        "desc": "Retrieves a flow context property."
+    },
+    "$global": {
+        "args": "string",
+        "desc": "Retrieves a global context property."
     }
-
-
 }