Thank you ergophobe for decoupling my question.
When you say that Joomla is going to want to build the whole page, that is of some concern, as I want to link my pages to the twitter bootstrap toolkit to convert to a minimalist version HTML5 and don't want Joomla to take over everything. I was thinking it could be used as an abstraction over the back-end connection to a MySql database, for example, etc. But best way is to play with it, obviously. It seems hard to find information on how to connect these tools. Thank you.