Why prefix views with a 'v'? Tables and views are identical as far as clients are concerned -- there is no reason to muddle your data model with that prefix.

Also, please define "reference". At what point does a "reference" table cease being for a reference? Can a non-reference table become a reference? Will you rename the tables at those times? You mention tables of two columns being reference tables. Can a three-column table ever be a reference? Four? What's the cutoff?