diff --git a/operator-dot.go b/operator-dot.go
index a3b67f9..f75837e 100644
--- a/operator-dot.go
+++ b/operator-dot.go
@@ -65,17 +65,27 @@ func evalDot(ctx ExprContext, self *term) (v any, err error) {
 				err = fmt.Errorf("key %v does not belong to the dictionary", rightValue)
 			}
 		}
-	case *dataCursor:
+	// case *dataCursor:
+	// 	if indexTerm.symbol() == SymIdentifier {
+	// 		opName := indexTerm.source()
+	// 		if opName == resetName {
+	// 			_, err = unboxedValue.Reset()
+	// 		} else if opName == cleanName {
+	// 			_, err = unboxedValue.Clean()
+	// 		} else {
+	// 			err = indexTerm.Errorf("iterators do not support command %q", opName)
+	// 		}
+	// 		v = err == nil
+	// 	}
+	case ExtIterator:
 		if indexTerm.symbol() == SymIdentifier {
 			opName := indexTerm.source()
-			if opName == resetName {
-				err = unboxedValue.Reset()
-			} else if opName == cleanName {
-				err = unboxedValue.Clean()
+			if unboxedValue.HasOperation(opName) {
+				v, err = unboxedValue.CallOperation(opName, []any{})
 			} else {
-				err = indexTerm.Errorf("iterators do not support command %q", opName)
+				err = indexTerm.Errorf("this iterator do not support the %q command", opName)
+				v = false
 			}
-			v = err == nil
 		}
 	default:
 		err = self.errIncompatibleTypes(leftValue, rightValue)