Package docbook-style-dsssl

Norman Walsh's modular stylesheets for DocBook

http://docbook.sourceforge.net/

These DSSSL stylesheets allow to convert any DocBook document to another
printed (for example, RTF or PostScript) or online (for example, HTML) format.
They are highly customizable.

General Commands (Section 1)
collateindex.pl
collateindex.pl creates index data for DocBook XML or SGML files.