In this environment the sort mode and order the program are set. The
format is
\sort{
mode{off/on/auto}
collation{ASCII/mixed}
sorttypeorder{[pattern/key/name][,pattern/key/name][,pattern/key/name]}
nameorder{ascending/descending}
keyfield{<field name>}
keyorder{ascending/descending}
patternfile{<pattern file name>}
patternorder{first/last}
addtonewfiles{sorted/all/none}
}