diff --git a/model/ddl.sql b/model/ddl.sql
index 3b1e520..d10433c 100644
--- a/model/ddl.sql
+++ b/model/ddl.sql
@@ -156,6 +156,7 @@ CREATE TABLE PUBLIC.MEASUREMENT (
     SIZE INTEGER NOT NULL DEFAULT -1,
     DATA_SOURCE JSONB NOT NULL DEFAULT '{}', -- http://server.baseware.net:6875/books/product-design-docs/page/7eacb
     EVENT_PLAN JSONB NOT NULL DEFAULT '{}',  -- http://server.baseware.net:6875/books/product-design-docs/page/02522
+    BINDING JSONB NOT NULL DEFAULT '{"ct":{"ratio":1.0,"polarity":1,"index":0},"pt":{"ratio":1.0,"polarity":1,"index":0}}',
     BAY_UUID UUID NOT NULL,
     COMPONENT_UUID UUID NOT NULL,
     OP INTEGER NOT NULL DEFAULT -1,