Org mode can generate an index across the files of a publishing project.
The file will be created when first publishing a project with the
:makeindex set. The file only contains a statement
"theindex.inc". You can then build around this include statement by adding
a title, style information, etc.
Index entries are specified with
#+INDEX keyword. An entry that
contains an exclamation mark will create a sub item.
* Curriculum Vitae #+INDEX: CV #+INDEX: Application!CV