diff --git a/learnware/market/heterogeneous/utils.py b/learnware/market/heterogeneous/utils.py
index 1be7ba6..6732991 100644
--- a/learnware/market/heterogeneous/utils.py
+++ b/learnware/market/heterogeneous/utils.py
@@ -20,6 +20,11 @@ def is_hetero(stat_specs: dict, semantic_spec: dict) -> bool:
         table_stat_spec = stat_specs["RKMETableSpecification"]
         table_input_shape = table_stat_spec.get_z().shape[1]
 
+        semantic_data_type = semantic_spec["Data"]["Values"]
+        if len(semantic_data_type) > 0 and semantic_data_type != ["Table"]:
+            logger.warning("User doesn't provide correct data type, it must be Table.")
+            return False
+
         semantic_task_type = semantic_spec["Task"]["Values"]
         if len(semantic_task_type) > 0 and semantic_task_type not in [["Classification"], ["Regression"]]:
             logger.warning("User doesn't provide correct task type, it must be either Classification or Regression.")