http://iconclass.org",
              publisher: "RKD, The Netherlands Institute for Art History"
          },
            "w3c-language-tags": {
                title: "Language Tags in HTML and XML",
                href: "https://www.w3.org/International/articles/language-tags/",
                publisher: "W3C"
            },
            "annotation-vocab": {
              "authors": [
                 "Robert Sanderson",
                 "Paolo Ciccarese",
                 "Benjamin Young"
             