Defernia is the system for defining the Ernia, a fictional world. Its name is an abbreviation of Defining Ernia. It is also a name of a website; see http://defernia.org/ also.
The source code is distributed under AGPL 3 (see LICENSE file as well) and hosted on Mercurial repository:
$ hg clone https://bitbucket.org/dahlia/defernia
You can read the development documentation in the following URL:
Or build the documentation by yourself:
$ easy_install "Sphinx>=1.0" $ cd docs/ $ make html $ make openhtml