Feeds cheatsheet for developers

In this article I would like to create some notes about architecture of the Feeds module. This is really great module and it is real “must know” when we are talking about regular import of the data from some sources.

There is great documentation available on http://drupal.org/documentation/modules/feeds. Here I try to create a cheatsheet for 7.x version of the module that let developers brief understanding about how things work.