<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ListItem>
<https://vi.scribd.com/document/71877594/Mo-hinh-Just-in-time-trong-qu%E1%BA%A3n-tr%E1%BB%8B-ch%E1%BA%A5t-l%C6%B0%E1%BB%A3ng>