Difference between create and create-action in sugar 7?

Hi All,

When you explore the clients/base/views/ there are two folders for new records for validations or any other logic (create and create-actions).
We normally do the stuff in create-actions.(js/php).
If you go to main clients there is another create directory , I wonder for what purpose this is?

Did any body ever worked with this (create.js or create.php)?

Thank you,