diff --git a/rfc3.md b/rfc3.md
index f050e97..f6e5a37 100644
--- a/rfc3.md
+++ b/rfc3.md
@@ -409,8 +409,10 @@ should have the following tables:
 * appmetadata - Describes additional information about application data. Fields:
     * id INTEGER PRIMARY KEY AUTOINCREMENT
     * appdata_id INTEGER
+    * metadata_id INTEGER
     * value VARCHAR(32)
     * FOREIGN KEY (appdata_id) REFERENCES appdata (id)
+    * FOREIGN KEY (metadata_id) REFERENCES appdata (id)
 
 * tokens - For providing access to resource. Fields:
     * id INTEGER PRIMARY KEY AUTOINCREMENT