<https://secure.gravatar.com/avatar/6b33ea06204dd45f644f9ab0f8a99d3a?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://buceandoenlamemoria.com/curso-de-sap-hana-administrator/>