<https://www.iogp-jip33.org/specification/subsea-fasteners-alloy-and-carbon-steel-bolting/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.iogp-jip33.org/specification/subsea-fasteners-alloy-and-carbon-steel-bolting/>