How do I pass a string to sub init() of XML file?

Init is executed when the component is compiled, so I wouldn't think you would be able to 'pass' a value into it in Init from outside the component.  To set a variable within the init function you would just do that -- m.temp="Hello"

You would be able to pass values into compiled components by making the value global so the component can pull from the global namespace, or by setting up a field in the xml to transfer values in and out of the component.

<interface>
 <field id="mydata" type="string" />
 </interface>

Thank you!