<tal:def
    define="
        proto nocall:here/@@proto;
        site_title proto/site_title;
        title here/Title;
    ">
<tal:c condition="view/is_anon">
    <meta content="${site_title}: ${title}" property="og:site_name">
    <meta content="${title}" property="og:title">
    <meta tal:condition="view/get_description" content="${view/get_description}" property="og:description">
    <meta content="${proto/logo_icon}" property="og:image">
    <meta content="png" property="og:image:type">
    <meta content="website" property="og:type">
</tal:c>
<link rel="manifest" href="${view/get_manifest}">
<meta name="apple-mobile-web-app-title" content="${site_title}: ${title}">
<meta name="mobile-web-app-title" content="${site_title}: ${title}">
</tal:def>
