Like other commentor says: parent/child. But also selecting by content (e.g. "click the button with the delete-icon" or "find the link with '@harrypotter') or s

Like other commentor says: parent/child. But also selecting by content (e.g. "click the button with the delete-icon" or "find the link with '@harrypotter') or selecting by attributes (e.g. click the pager-item that goes to next page) or selecting items outside of body (e.g. og-tags, title etc). All are doable in CSS3 selectors, but everything shouts that they are not meant for this; whereas xpath does this far more natural.