diff --git a/source/description.rst b/source/description.rst
index 05b196a..0d7696b 100644
--- a/source/description.rst
+++ b/source/description.rst
@@ -593,7 +593,7 @@ String specifying the data type of the attribute. Allowable values are:
 +--------------------------+----------------------------------+----------------+
 | * "isodatetime"          | ISO 8601 datetime string, e.g.,  | variable       |
 |                          | 2018-09-28T14:43:54.123+02:00    | (ASCII         |
-| * "datetime"             |                                  | encoding)      |
+| * "datetime"             | Can be missing time              | encoding)      |
 +--------------------------+----------------------------------+----------------+
 
 .. note::