Thanks for the feedback, Higgins is still pre 1.0 and our next milestone
after the current one is focused on documentation, packaging, etc.
If you are looking for more information about specific components in the
Architecture diagram, the best place to look is under the Components
navigation bar on the left hand side of the page, right under
Architecture. Scroll down to the component you are interested and click on
the blue links. (If the descriptions haven't been done yet, the text is
black or red.) The questions you are asking about are in the Token Service
component. The Token Service description page has a more detailed diagram
of the Token Service internals. We are planning to provide javadoc for the
components - see example for IdAS under the Downloads navigation bar on
the left. Please let me know if this helps/doesn't help. Your feedback
can help make information more accessable.