--- a/configmix/config.py	Wed Apr 28 09:19:55 2021 +0200
+++ b/configmix/config.py	Wed Apr 28 09:23:14 2021 +0200
@@ -194,14 +194,16 @@
 
     def _lookupref(self, key, default=_MARKER):
         """
-        `key` must be a reference URI without any (namespace) prefixes
-        and suffixes
+
+        `key` must be a configuration reference URI without any
+        (namespace) prefixes and suffixes
 
         """
         return self.expand_ref_uri(key, default=default)
 
     def expand_if_reference(self, v, default=_MARKER):
-        """Check whether `v` is a reference and -- if true -- then expand it.
+        """Check whether `v` is a configuration reference and -- if true --
+        then expand it.
 
         `v` must match the pattern ``{{ref:<REFERENCE>}}``