In section 4 of this blog entry jQueryUI is loaded by
wp_enqueue_script('jquery'); wp_enqueue_script('jquery-ui-core'); wp_enqueue_script('jquery-ui-datepicker', $pluginfolder . '/jquery.ui.datepicker.min.js', array('jquery', 'jquery-ui-core') );
The first two lines indicate, that jquery UI handles are predefined. The third line loads the datepicker from a custom file whereas the datepicker seems to be onboard with concurrent Wordpress.
Since I don't want to join the cargo cult, how can I load as much jQueryUI as possible from onboard hence avoiding custum overloading?