diff --git a/src/icartt/dataset.py b/src/icartt/dataset.py
index 6d3c7cedeed91b48e679f285a5218d3e35387e96..862adda62ecabd8ed50dd2f31778b0636c212107 100644
--- a/src/icartt/dataset.py
+++ b/src/icartt/dataset.py
@@ -981,7 +981,7 @@ class Dataset:
         """
 
         self.format = format
-        self.version = None
+        self.version = None # TODO: should this be 2.0 by default?
 
         self.dataID = "dataID"
         self.locationID = "locationID"
@@ -1028,6 +1028,7 @@ class Dataset:
 
             if not self.isValidFileName(pathlib.Path(f).name):
                 warnings.warn(f"{pathlib.Path(f).name} is not a valid ICARTT filename")
+            # TODO: else -> split on "_", then the first part should be dataID, second part locationID
 
             self.readHeader(delimiter)
             if loadData: