diff --git a/lib/bindings/http/constants.js b/lib/bindings/http/constants.js
index 626889d..c4d312f 100644
--- a/lib/bindings/http/constants.js
+++ b/lib/bindings/http/constants.js
@@ -75,5 +75,17 @@ module.exports = {
     DATA_SCHEMA       : "ce-dataschema",
     SUBJECT           : "ce-subject",
     EXTENSIONS_PREFIX : "ce-"
+  },
+  STRUCTURED_ATTRS_1 : {
+    TYPE              : "type",
+    SPEC_VERSION      : "specversion",
+    SOURCE            : "source",
+    ID                : "id",
+    TIME              : "time",
+    DATA_SCHEMA       : "dataschema",
+    CONTENT_TYPE      : "datacontenttype",
+    SUBJECT           : "subject",
+    DATA              : "data",
+    DATA_BASE64       : "data_base64"
   }
 };