<%_ const author = head.author ?? {}; _%>
<meta property="author" content="<%= author.name ?? '' -%>">
<link rel="author" href="<%= author.url ?? '' -%>">
<meta property="article:published_time" content="<%= author.published_time ?? '' -%>">
<meta property="article:modified_time" content="<%= author.modified_time ?? '' -%>">
<link rel="canonical" href="<%= head.canonical ?? head.url ?? "" -%>">
<link rel="alternate" href="<%= head.alternate ?? "" -%>">
<meta rel="alternate" content="<%= head.referrer ?? "unsafe-url" -%>">