diff --git a/schema/core-person.json b/schema/core-person.json
index a43fa37..17c2de0 100644
--- a/schema/core-person.json
+++ b/schema/core-person.json
@@ -65,7 +65,10 @@
                  "description": "Identifier used in federated scenarios, now SAML identifier profile 'subject-id'",
              },
                 
-            "birthDate": {"type": "string"},
+            "birthDate": {
+                "type": "string",
+                "description": "Date of birth"},
+                
             "email": {
                 "type": "array",
                 "items": {
@@ -88,7 +91,9 @@
                 }
             },
                 
-            "personalPronoun": {"type": "string"}
+            "personalPronoun": {
+                "type": "string",
+                "description": "Preferred personal pronoun"}
         }
     }
 }