diff --git a/schema/metadata/entityDefs.json b/schema/metadata/entityDefs.json
index 42e298f4bb..9cf117e133 100644
--- a/schema/metadata/entityDefs.json
+++ b/schema/metadata/entityDefs.json
@@ -430,6 +430,9 @@
                                     {"const": "datetime"},
                                     {"const": "datetimeOptional"},
                                     {"const": "link"},
+                                    {"const": "linkParent"},
+                                    {"const": "linkOne"},
+                                    {"const": "linkMultiple"},
                                     {"const": "multiEnum"},
                                     {"const": "urlMultiple"},
                                     {"const": "checklist"},