Hello,
I evaluate TAMINO with the XML starter KIT.
My application can easily connect to a Database through JDBC driver but do not implement yet X-QUERY - style mechanism.
I see in the documentation that you can access to the SQL engine through
Tamino contains two data stores - a native XML and an sql store.
You can access the sql store via ODBC or JDBC, but not the native XML store. On the other hand Tamino can provide you access to both the native and the SQL store via the XPath query interface.