[Inkscape-user] How to add object properties

Hi list,

I want to add some new properties to the inkscape "object properties" window. I would like to use inkscape for the generation of some specific interface files but need more than "id","onclick","onmouseover",etc. It would be somewhat of a solution to just use "onclick" as "I/O input" but it would be so much nicer to be able to rename or add these properties.

Is it possible to change these things from within inkscape ?

Kind regards Bram