Prettyref provides a command \newrefformat, which specifies the
way in which a reference is typeset, according to a label
"identification". The identification is set in the \label
command, by using prefixed label names; so instead of
\label{mysection}, one uses \label{sec:mysection}, and
prettyref interprets the "sec:" part. The package is compatible
with hyperref and with other packages.
