API/Queries/Query-Search-Options.md

@@ -184,6 +184,18 @@ This is an extension for IronAPI. Does the left JSONB value contain the right JS
 }
 ```
 
+## JSONB Key exists (?)
+
+This is an extension for IronAPI. Does the JSONB this at the top level?
+
+```json
+{
+  "conds": {
+    "data" : {"?" : "temperature_person"}
+  }
+}
+```
+
 ## -subtree
 
 This is an extension for IronAPI.