Thanks for your reply, i will try to digest it in the next few days.
One comment that I dont understand:
> Of course, DoubleSets and FloatSets have a single
>ManifoldDimension (that is currently always equal to the DomainDimension)
>and they are not SimpleSets (because I never intended them to serve as
>Field DomainSets - but only added the test for this ten minutes ago -
>I must have missed it 18 months ago when I first wrote FieldImpl.java).
In my listing of visad 2.0, DoubleSet and FloatSet extend SimpleSet.