This post aims to be a very basic introduction to the world of Lithium, also known as li3. As such, it is mostly based on the ubiquitous blog sample. The idea is to learn, through the source code, the basic notions on Lithium and its integration with the Doctrine ORM mapper to build a very basic blog application. Unlike the blog example at rad-dev.org, this example is based on Doctrine 2.0, which