To install this package, run in Emacs:
M-x package-install RET sisu-mode RET
SiSU (http://www.sisudoc.org/) is a document structuring and publishing framework. This package provides an Emacs major mode for SiSU markup. When this package is installed, files ending in ".sisu" are automatically associated with sisu-mode. If a file doesn't have a .sisu extension, add a first line: # -*- Sisu -*- The documentation for the "Structure Of The Hierarchy Text" can be found in the sisustring for the sisu-mode function.