Comments
In general, this resource is very poorly described. As a developer, I would be hard-pressed to understand how all the bits fit together, especially without numerous links to the sections where perhaps the material is described? As it sits, it is a head scratcher. For example, a link to "transaction" would be appropriate here, minimally.

Grahame's Comments
can add more links at the top. It's true that this serves other infrastructure, rather than being a resource on it's own. Beef up the documentation