"navigation": [#(nav-domains)#::
    {
      "facetname": "domains",
      "displayname": "Domains",
      "type": "String",
      "min": "0",
      "max": "0",
      "mean": "0",
      "elements": [
#{element}#
        {"name": "#[name]#", "count": "#[count]#", "modifier": "#[modifier]#", "url": "#[url-json]#"}#(nl)#::,#(/nl)#
#{/element}#
      ]
    },#(/nav-domains)##(nav-authors)#::
    {
      "facetname": "authors",
      "displayname": "Authors",
      "type": "String",
      "min": "0",
      "max": "0",
      "mean": "0",
      "elements": [
#{element}#
        {"name": "#[name]#", "count": "#[count]#", "modifier": "#[modifier]#", "url": "#[url-json]#"}#(nl)#::,#(/nl)#
#{/element}#
      ]
    }#(/nav-authors)##(nav-topics)#::
    {
      "facetname": "topics",
      "displayname": "Topics",
      "type": "String",
      "min": "0",
      "max": "0",
      "mean": "0",
      "elements": [
#{element}#
        {"name": "#[name]#", "count": "#[count]#", "modifier": "#[modifier]#", "url": "#[url-json]#"}#(nl)#::,#(/nl)#
#{/element}#
      ]
    }#(/nav-topics)#
    ]