{{ $pageScope := . }}

{{ with .Page.Param "Author" }}
    {{ partial "author.html" $pageScope }}
{{ end }}
{{ with .Page.Param "categories" }}
    | Category: {{ partial "categories.html" $pageScope }}
{{ end }}
{{ with .Page.Param "series" }}
    | Series: {{ partial "series.html" $pageScope }}
{{ end }}
{{ with .Page.Param "tags" }}
    | {{ partial "tags.html" $pageScope }}
{{ end }}