Parsed data is an array where keys are nodes from XML file with its attributes
(if any). Only distinguishing attributes are taken into account (see [1]).
Below are examples of parsed data structure.
such XML data:
will be converted to such array:
array(
'dates' => array(
'calendars' => array(
'calendar[@type="gregorian"]' => array(
'months' => ''
),
'calendar[@type="buddhist"]' => array(
'months' => ''
),
)
)
)