org-list-full-item-re

org-list-full-item-re is a variable defined in `org-list.el'.
Its value is

"^[ 	]*\\(\\(?:[-+*]\\|\\(?:[0-9]+\\|[A-Za-z]\\)[.)]\\)\\(?:[ 	]+\\|$\\)\\)\\(?:\\[@\\(?:start:\\)?\\([0-9]+\\|[A-Za-z]\\)\\][ 	]*\\)?\\(?:\\(\\[[ X-]\\]\\)\\(?:[ 	]+\\|$\\)\\)?\\(?:\\(.*\\)[ 	]+::\\(?:[ 	]+\\|$\\)\\)?"

• This variable may be risky if used as a file-local variable.

Documentation:
Matches a list item and puts everything into groups:
group 1: bullet
group 2: counter
group 3: checkbox
group 4: description tag