Specify whether to split the index file into multiple files, alphabetically, one file per letter, plus a file for any index entries that start with non-alphabetical characters.

Default Value:

> The default value of this parameter is set according to the `-splitindex` option found on the Javadoc command line. If this option is specified, the default value is `true`, otherwise it is `false`.

> ${include ../refs/standard_doclet_options.htm}