diff --git a/cdisc_rules_engine/constants/__init__.py b/cdisc_rules_engine/constants/__init__.py
index e61d21310..dd9b42e14 100644
--- a/cdisc_rules_engine/constants/__init__.py
+++ b/cdisc_rules_engine/constants/__init__.py
@@ -17,3 +17,7 @@
 NULL_FLAVORS = ["", None, {None}, [], {}, np.nan]
 
 KNOWN_REPORT_EXTENSIONS = [".json", ".xlsx", ".xls"]
+
+VALIDATION_FORMATS_MESSAGE = (
+    "SAS V5 XPT, Dataset-JSON (JSON or NDJSON), or Excel (XLSX)"
+)
diff --git a/core.py b/core.py
index 6048935c1..25733b52a 100644
--- a/core.py
+++ b/core.py
@@ -35,13 +35,12 @@
     get_rules_cache_key,
     validate_dataset_files_exist,
 )
+from cdisc_rules_engine.constants import VALIDATION_FORMATS_MESSAGE
+from cdisc_rules_engine.enums.dataformat_types import DataFormatTypes
 from scripts.list_dataset_metadata_handler import list_dataset_metadata_handler
 from scripts.run_validation import run_validation
 from version import __version__
 
-VALIDATION_FORMATS_MESSAGE = (
-    "SAS V5 XPT, Dataset-JSON (JSON or NDJSON), or Excel (XLSX)"
-)
 DEFAULT_CACHE_PATH = os.path.join(
     os.path.dirname(os.path.abspath(__file__)), DefaultFilePaths.CACHE.value
 )