yelp-xsl is an open source, freely distributed and small software project that has been designed as part of the Yelp project, providing core XSLT (XSL Transformations) stylesheets used by the libyelp library, as well as by the Yelp software itself.

Yelp is an open source collection of documentation utilities for the GNOME desktop environment. Notably, it contains utilities for building documentation and all auxiliary files in your source tree.

The Yelp project also contains the libyelp GTK+ library that makes it easy to build a help viewer, or embed one in an application, and yelp-tools, a collection of command-line tools for checking and building documentation.

After compiling and installing the yelp-xsl software, users will be able to build stylesheets in order to create websites, such as https://help.gnome.org/, or site-building tools, such as https://gitorious.org/projectmallard/mallard-site-tool.

To install and use this package in your GNU/Linux machine, you should first download the latest version from Softpedia, where it is distributed as a source tarball (tar.xz archive), save it locally, extract its contents and open a terminal emulator.

In the Linux terminal window, use the ‘cd’ command to go to the location of the extracted archive files, then execute the “./configure && make” command to configure (optimize) and compile the program for your architecture and operating system.

After a successful compilation, you will be able to install yelp-xsl system wide by running the “make install” command as root (system administrator) or with sudo.