# Now prefixes are mapped, set the expanded name of the attribute at `index`.
	private fun set_attribute_ns(index: Int) do
		var name = ["", "", ""]

		process_name(atts.qname(index).as(not null), name, true)
		atts.uri(index) = name[0]
		atts.local_name(index) = name[1]
	end