Document the values property

1 files changed, 10 insertions, 0 deletions

diff --git a/docs/source/user/settings.rst b/docs/source/user/settings.rst
index e951621..565ae73 100644
--- a/docs/source/user/settings.rst
+++ b/docs/source/user/settings.rst
@@ -108,3 +108,13 @@ Some field types may add other custom properties.
 
       Other clients may decide to use a different workflow.
 
+``values``
+----------
+
+The ``string``, ``text``, ``list`` and numeric types can have a property
+``value`` with a list of valid values for that field.
+
+An empty value is always allowed.
+
+For the ``list`` type, each element of the list is checked, not the
+whole list.