1 files changed, 8 insertions, 0 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index c7bf95b426..28862a1d25 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -119,3 +119,11 @@ class UserTypes(object):
     """
     SUPPORT = "support"
     ALL_USER_TYPES = (SUPPORT,)
+
+
+class RelationTypes(object):
+    """The types of relations known to this server.
+    """
+    ANNOTATION = "m.annotation"
+    REPLACES = "m.replaces"
+    REFERENCES = "m.references"