Graphical notation standard for OWL

 Hi,
Id like to know if there is graphical notation standard for OWL ?
I found some initiatives below but noneone is official by w3c.
I want a guideline to design interfaces for semantic visualization with
standards simbols like the UML is nowadays for modeling systems.

Initiatives:
http://www.charlestoncore.org/dlg2/
http://www.semanticdesktop.org/ontologies/nao/

Thanks
Marcel

-- 
Marcel Ferrante Silva
PHD in Information Science - ECI/UFMG
www.finaltec.com.br
+55 31 8851-9069 2626-2859
MSN: marcelferrante@hotmail.com