@php
    $year = null;
    $month = null;
    $day = null;
    if($document->fieldValue("issued")){
        $issued = $document->fieldValue("issued");
        $parts = explode("-", $issued);
        if(sizeof($parts) === 3){
            $year = $parts[0];
            $month = $parts[1];
            $day = $parts[2];
        }
        if(sizeof($parts) === 2){
            $year = $parts[0];
            $month = $parts[1];
        }
        if(sizeof($parts) === 1){
            $year = $parts[0];
        }
    }
@endphp
@if($year)
    year = {{$year}}
@endif
@if($month)
    month = {{$month}}
@endif
@if($day)
    day = {{$day}}
@endif