fixed alias determination

Author: TonioF

test/core/store/test_store.py

@@ -55,7 +55,8 @@ class TestBaseFsDataStore(unittest.TestCase):
     def test_get_data_opener_ids(self):
         store = new_data_store("file")
         self.assertEqual(
-            ("dataset:geotiff:file",), store.get_data_opener_ids(data_id="test.geotiff")
+            ("mldataset:geotiff:file", "dataset:geotiff:file",),
+            store.get_data_opener_ids(data_id="test.geotiff")
         )
         self.assertEqual(
             ("mldataset:geotiff:file",),

xcube/core/store/fs/store.py

@@ -729,7 +729,7 @@ def _guess_all_accessor_id_parts(
         assert_given(data_id, "data_id")
         ext = self._get_filename_ext(data_id)
         if data_type:
-            data_type_aliases = DataType.normalize(data_type).aliases
+            data_type_aliases = [DataType.normalize(data_type).alias]
         else:
             data_type_aliases = None
         format_id = filename_ext_to_format.get(ext.lower())