<https://blog.prosig.com/2001/06/06/removing-phase-delay-using-phaseless-filtering/phsless2/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.prosig.com/2001/06/06/removing-phase-delay-using-phaseless-filtering/phsless2/>