a!linkField(
  links: {
    a!safeLink(
      label: if(
        isnull(
          ri!label_txt
        ),
        "",
        ri!label_txt
      ),
      uri: "/suite/plugins/servlet/excelReport?reportId=" & if(
        isnull(
          ri!report_document
        ),
        "",
        document(
          ri!report_document,
          "id"
        )
      )&"&filename="&if(isnull(ri!label_txt),"Appian_Data_Export",substitute(substitute(
          ri!label_txt,
          " ", "_"
        ), "Export_","")
)&"_"&datetext(now(),"MM_dd_yyyy_HH_mm")

    )
  }
)