{{- $abbr := .Get 0 -}}
{{- $mode := default "shortTitle" ( .Get 1 ) -}}

{{- with ( index $.Site.Data.abbreviations $abbr ) -}}
    {{- if ( or ( eq $mode "shortTitle" ) ( eq $mode "shortTitlePl" ) ) -}}
        <abbr class="abbr" title="
        {{- if ( eq $mode "shortTitle" ) -}}
            {{- .longTitle -}}
        {{- else if ( eq $mode "shortTitlePl" ) -}}
            {{- with .longTitlePl -}}{{- . -}}{{- else -}}{{- .longTitle -}}s{{- end -}}
        {{- end -}}
        ">
        {{- if ( eq $mode "shortTitle" ) -}}
            {{- .shortTitle | safeHTML -}}
        {{- else if ( eq $mode "shortTitlePl" ) -}}
            {{- with .shortTitlePl -}}{{- . | safeHTML -}}{{- else -}}{{- .shortTitle | safeHTML -}}s{{- end -}}
        {{- end -}}
        </abbr>
    {{- else if ( or ( eq $mode "longtitle" ) ( eq $mode "longTitlePl" ) ) -}}
        {{- if ( eq $mode "longTitle" ) -}}
            {{- .longTitle | safeHTML -}}
        {{- else if ( eq $mode "longTitlePl" ) -}}
            {{- with .longTitlePl -}}{{- . | safeHTML -}}{{- else -}}{{- .longTitle | safeHTML -}}s{{- end -}}
        {{- end -}}
    {{- else if ( or ( eq $mode "fullTitle" ) ( eq $mode "fullTitlePl" ) ) -}}
        {{- if ( eq $mode "fullTitle" ) -}}
            {{- .longTitle | safeHTML -}}&nbsp;(<abbr>{{- .shortTitle | safeHTML -}}</abbr>)
        {{- else if ( eq $mode "fullTitlePl" ) -}}
            {{- with .longTitlePl -}}{{- . | safeHTML -}}{{- else -}}{{- .longTitle | safeHTML -}}s{{- end -}}
            &nbsp;(<abbr>{{- with .shortTitlePl -}}{{- . | safeHTML -}}{{- else -}}{{- .shortTitle | safeHTML -}}s{{- end -}}</abbr>)
        {{- end -}}
    {{- end -}}
{{- else -}}
    {{- errorf "No definition found for abbreviation '%q'" $abbr -}}
{{- end -}}