Add DataItemLink property snippet.

snippets/query.json

@@ -69,5 +69,12 @@
             "}"
         ],
         "description": "Snippet: Query of type API"
+    },
+    "Query DataItemLink": {
+        "prefix": "tquerydataitemlink",
+        "body": [
+            "\t\t\tDataItemLink = ${1:id} = ${2:parent}.${3:parentid};"
+        ],
+        "description": "Add a data item link to a data item"
     }
 }