code: def highwiredict2xmlstring(highwire_elements, ordering=HIGHWIRE_ORDER):
      
      # Sort the elements by the ordering list.
      highwire_elements.sort(key=lambda obj: ordering.index(obj.name))
      root = Element('metadata')
      for element in highwire_elements:
          attribs = {'name': element.name, 'content': element.content}
          SubElement(root, 'meta', attribs)
      # Create the XML tree.
      return '<?xml version="1.0" encoding="UTF-8"?>\n' + tostring(
          root,
          pretty_print=True
      )
docs: Create an XML string from the highwire data dictionary.