reftex: Builtin Index Macros

 
 5.4 Builtin Index Macros
 ========================
 
 RefTeX by default recognizes the ‘\index’ and ‘\glossary’ macros which
 are defined in the LaTeX core.  It has also builtin support for the
 re-implementations of ‘\index’ in the ‘multind’ and ‘index’ packages.
 However, since the different definitions of the ‘\index’ macro are
 incompatible, you will have to explicitly specify the index style used.
 SeeCreating Index Entries, for information on how to do that.