http://codesuppository.blogspot.com/2013/07/bitcoin-code-snippets.html

I am also writing a thorough piece of documentation for this exact topic right now.  You can read what I have so far here, I created a detailed graphic.  I don't expect to be completely finished with the article until tomorrow.

http://codesuppository.blogspot.com/2014/01/how-to-parse-bitcoin-blockchain.html