Macros on trigger level for use in action operations

Would be nice to be able to set some kind of macros/variables on trigger level which then can be referenced in action operations.
That way one can provide additional information per trigger without putting them into the trigger name itself.

One use case might be the connection to another monitoring infrastructure which can handle/needs additional codes or tags. The only way to achieve this with the current release is to put such information into the trigger name what can look very ugly inside Zabbix and other actions.