diff --git a/16-dataspaces/README.md b/16-dataspaces/README.md
index f50c2a1..1b511e0 100644
--- a/16-dataspaces/README.md
+++ b/16-dataspaces/README.md
@@ -3,10 +3,12 @@ Style #16
 
 Constraints:
 
-- Existence of one or more data spaces where processes store and
+- Existence of one or more units that execute concurrently
+
+- Existence of one or more data spaces where concurrent units store and
   retrieve data
 
-- Existence of one or more processes that execute concurrently
+- No direct data exchanges between the concurrent units, other than via the data spaces
 
 Possible names: