The LaTeX Package splitidx and the Index Preprocessor splitindex#

The splitindex project originated years ago in response to a question about how I manage the splitting of the index for the KOMA-Script manual. With makeidx, LaTeX provides a standard package for creating an index for each document. Sometimes, however, more than one index is needed. There are various packages offering different solutions, each with their own problems when creating multiple indexes. The LaTeX package splitidx offers another solution to this problem. Furthermore, splitidx allows for the individual customization of the typesetting and appearance of these indexes, as well as the formatting of individual index entries. Since classical TeX, as well as PDFTeX and XeTeX, support a maximum of 16 files open for writing at the same time, splitidx also offers a solution. Instead of opening multiple files simultaneously for the entries of the different indexes, all entries are collected in a single file and then split using the splitindex program. splitindex then automatically calls the desired index processor—usually makeindex— for each of these files.

The project will be hosted on Codeberg. Further information can be found in the CTAN catalog entry.