secondaryie — A secondary term in an index entry, rather than in the text
secondaryie ::= (text | | | | | | | | | | | | | | | | )*
secondaryie identifies a secondary word or
words in an
indexentrys, you can specify as many
secondary terms as are necessary. Secondary and tertiary terms can be
mixed, following the primary.
Formatted as a displayed block. The
secondaryies occur below the
primaryie, usually aligned with each other and
indented from the primary.