Hi Dan I tweaked the class a bit and it now visualizes the models at the online service at [1]... it does a better job than the previous one in displaying everything at a time but it quickly gets confusing if the model is big. Cheers, Janne [1] http://jigsaw.w3.org:8000/description -- Janne Saarela | Visiting scientist Email: jsaarela@w3.org | World Wide Web Consortium http://www.w3.org/