Howto generate a ibis model from schematic/extracted design

Hi,

is there any tutorial that explains how to generate an IBIS model in Virtuoso 6.1.7. ?

I do have a CML output buffer and want/need to generate an IBIS model.

As I have never done that before I am looking for a step-by-step tutorial for Virtuoso.

Of course I search the web and this forum, but didnt find any useful document.

Any link would be great !