- 
Select a different schema file, if the Schema field is set to Customize.
 - 
Select a different reference map file to map the reference identifiers, business key, and custom attributes.
 - 
Add new custom message attributes.
 
Modifying Message Types
You can modify a message type’s settings, but what you can modify depends on the message type’s usage and protocol:
- 
In the sidebar, select the <host-name> page.
 - 
Locate the message type you want to modify.
 - 
Change any of the following settings in the Edit message type window:
Message Type Format What You Can Modify Receive from Partners
EDIFACT or X12
JSON or XML
- 
Select a different schema file.
 - 
Select a different reference map file to map the reference identifiers, business key, and custom attributes.
 
Send to Partners
Any
Select a different schema file, if the Schema field is set to Customize.
Source at Host
EDIFACT or X12
- 
Select a different schema file, if the Schema field is set to Customize.
 - 
Select a different reference map file to map the reference identifiers, business key, and custom attributes.
 - 
Add new custom message attributes.
 
JSON or XML
- 
Select a different schema file.
 - 
Select a different reference map file to map the reference identifiers, business key, and custom attributes.
 
Target at Host
Any
Select a different schema file, if the Schema field is set to Customize.
 - 
 - 
To dissociate an associated custom message attribute from a Receive from Partners or Source at Host message type, remove it from the associated reference map.
 



