Stub vectors and classifications of various lengths%
as well as the means of producing arbitrary lengths%
are provided for convenience and testing.
Ten nvectors with each element containing the value~$0$ are
provided.
Sequence nvectors are of length~$n$ and have a sequence of values
from~$0$ to~$n1$.
Ten nclasses generated from the respective nvectors are provided.
\ref{_nvector_} generates vector constants of length~$n$ where each
element is assigned the provided value (or~$0$ if unspecified).

