When accessing Denodo Platform from any third party client like DBVisualizer, I was able to see the Virtual Databases and the views.
In Denodo Platform, all the elements such as data sources, views, stored procedures, widgets, etc are grouped under the Catalogs (Virtual Databases). And there is no concept called Schemas as in other Relational Databases.
Also, in order to access the views from other catalogs than the one which is used for establishing the connection to Denodo Platform from DBVisualizer, I would execute the query like:
`select * from <virtual_database_name>.<view_name>`
Hope this helps!