{
  "html": "http://www.w3.org/1999/xhtml",
  "mathml": "http://www.w3.org/1998/Math/MathML",
  "svg": "http://www.w3.org/2000/svg",
  "xlink": "http://www.w3.org/1999/xlink",
  "xml": "http://www.w3.org/XML/1998/namespace",
  "xmlns": "http://www.w3.org/2000/xmlns/"
}