(define-attributes ("default"))
(define-location-class "page-numbers" ("arabic-numbers"))
(markup-index :open  "~n\begin{theindex}~n"
              :close "~n\end{theindex}~n"
              :tree)
(markup-locclass-list :open "\quad{}")
(markup-locref-list   :sep ", ")
(markup-indexentry :open "~n  \item "           :depth 0)
( define-letter-group "A--D" :prefixes ("A" "B" "C" "D") )
( define-letter-group "E--G" :after "A--D" :prefixes ("E" "F" "G") )
( define-letter-group "H--K" :after "E--G" :prefixes ("H" "I" "J" "K") )
( define-letter-group "L--N" :after "H--K" :prefixes ("L" "M" "N" ) )
( define-letter-group "O--R" :after "L--N" :prefixes ("O" "P" "Q" "R") )
( define-letter-group "S--V" :after "O--R" :prefixes ("S" "T" "U" "V") )
( define-letter-group "W--Z" :after "S--V" :prefixes ("W" "X" "Y" "Z") )
(markup-letter-group-list :sep "~n\indexspace")