Update message documnet
diff --git a/src/main/resources/Documentation/message.md b/src/main/resources/Documentation/message.md
index 3fb08d3..a141852 100644
--- a/src/main/resources/Documentation/message.md
+++ b/src/main/resources/Documentation/message.md
@@ -1,4 +1,4 @@
-Message structure
+Message Format
======================
This plugin publish message like the below format to RabbitMQ.
@@ -8,32 +8,36 @@
**Bold** is literal.
Properties
-=======================
+-----------------------
-| name | value |
-|:-----------------|:---------------------------|
-| app_id | **gerrit** |
-| priority | *message.priority* |
-| delivery_mode | *message.deliveryMode* |
-| headers | <See Header section> |
-| content_encoding | **UTF-8** |
-| content_type | **application/json** |
+Properties are stored as message property.
+
+| name | value
+|:-----------------|:--------------------------
+| app_id | **gerrit**
+| priority | *message.priority*
+| delivery_mode | *message.deliveryMode*
+| headers | <See Headers section>
+| content_encoding | **UTF-8**
+| content_type | **application/json**
Headers
-=======================
+-----------------------
-| name | value |
-|:-----------------|:--------------------------------------------|
-| gerrit-name | *gerrit.name* |
-| gerrit-host | *gerrit.hostname* |
-| gerrit-scheme | *gerrit.scheme* |
-| gerrit-port | *gerrit.port* |
-| gerrit-front-url | *gerrit.canonicalWebUrl* in `gerrit.config` |
-| gerrit-version | gerrit version |
+Headers are stored in property.headers.
+
+| name | value
+|:-----------------|:------------------------------------------
+| gerrit-name | *gerrit.name*
+| gerrit-host | *gerrit.hostname*
+| gerrit-scheme | *gerrit.scheme*
+| gerrit-port | *gerrit.port*
+| gerrit-front-url | *gerrit.canonicalWebUrl* in `gerrit.config`
+| gerrit-version | gerrit version
Payload
-=======================
+-----------------------
Payload is JSON string. (same gerrit-events)
