Find everything between two XML tags with RegEx

Question

In RegEx, I want to find the tag and everything between two XML tags, like the following:

Answer 1

this can capture most outermost layer pair of tags, even with attribute in side or without end tags

().)*-->|<\w*((?!\/<).)*\/>|<(?\w+)[^>]*>(?>[^<]|(?R))*<\/\k\s*>)

edit: as mentioned in comment above, regex is always not enough to parse xml, trying to modify the regex to fit more situation only makes it longer but still useless