added support for v: variables in woql.doc (#181)

Signed-off-by: NeelParihar <neel@terminusdb.com>

Author: Neelterminusdb

lib/query/woqlDoc.js

@@ -19,13 +19,21 @@ function convert(obj) {
       },
     };
   } if (typeof (obj) === 'string') {
+    if (obj.indexOf('v:') === -1) {
+      return {
+        '@type': 'Value',
+        data: {
+          '@type': 'xsd:string',
+          '@value': obj,
+        },
+      };
+    }
+
     return {
       '@type': 'Value',
-      data: {
-        '@type': 'xsd:string',
-        '@value': obj,
-      },
+      variable: obj.split(':')[1],
     };
+
   // eslint-disable-next-line no-use-before-define
   } if (obj instanceof Var) {
     return {