<https://www.codeproject.com/Tips/152026/How-do-I-make-GSOAP-support-Unicode>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.codeproject.com/Tips/152026/How-do-I-make-GSOAP-support-Unicode?msg=5264884#xx5264884xx>