-> index objectClass,uid
-> index cn,sn eq,sub,approx
+> index uid
+> index cn,sn pres,eq,sub
+> index objectClass eq
+
+The first line sets the default set of indices to maintain to
+present and equality. The second line causes the default (pres,eq)
+set of indices to be maintained for the {{EX:uid}} attribute type.
+The third line causes present, equality, and substring indices to
+be maintained for {{EX:cn}} and {{EX:sn}} attribute types. The
+fourth line causes an equality index for the {{EX:objectClass}}
+attribute type.
+
+By default, no indices are maintained. It is generally advised
+that minimally an equality index upon objectClass be maintained.
+
+> index objectClass eq
+