"visko:isosurface" refers to an existing instance of some view, but the semantics of the query are to generate this view. I believe we need to move towards a query that requires view "classes" not "instances." Then, the job of the VisKo query answering system would be to generate instances of the view class specified.
Consider the VisKo query below:
SELECT visko:isosurfaces IN-VIEWER visko:firefox FROM http://rio.cs.utep.edu/HolesCodeFullPML/vel.3d FORMAT formats:BINARYFLOATARRAY TYPE types:d2
"visko:isosurface" refers to an existing instance of some view, but the semantics of the query are to generate this view. I believe we need to move towards a query that requires view "classes" not "instances." Then, the job of the VisKo query answering system would be to generate instances of the view class specified.