For large numbers of values, the most convenient way to aggregate is by matching on symbol names. Note that symbols must be available for a match to occur. All imported symbols are immediately available, but \tt{expand-sequence} may need to be used for symbols produced by the same package. \ref{_aggregate-rate-each_} aggregates values of generators (usually referred to by \tt{rate-each}) through summation. A \tt{rate-each} block is generated to perform the summation. Since \tt{rate-each} multiplies its body by \tt{_CMATCH_}, zero symbols would normally result in the summation of \tt{_CMATCH_} itself, which is not desirable; this template always includes \ref{ZERO} in the body to defend against this, causing a yield of~$0.00$ if there are no symbol matches. \ref{_aggregate-rate_} is analgous to \ref{_aggregate-rate-each_}, handling only scalar~\tt{@yields@}. A \tt{rate} block is generated to aggregate by summation. To prevent an empty rate block from being generated if there are no symbol matches, \ref{ZERO} is always included as part of the summation. \ref{_aggregate-classify_} aggregates classifications. Keep in mind that classifications act as universal quantifiers by default, meaning zero symbol matches will produce a match and a scalar~$1$; existential quantifiers (\tt{@any@} set to \tt{true}) will \emph{not} match and will produce the scalar~$0$.