discourse/app/views/list/list.erb

<%- if include_crawler_content? %>

<%= server_plugin_outlet "topic_list_header" %>

<%- if SiteSetting.tagging_enabled && @tag_id %>
  <h1>
    <%= link_to "#{Discourse.base_url}/tags/#{@tag_id}", itemprop: 'item' do %>
      <span itemprop='name'><%= @tag_id %></span>
    <% end %>
  </h1>
<% end %>

<% if @category %>
  <h1>
    <% if @category.parent_category %>
      <%= link_to @category.parent_category.url, itemprop: 'item' do %>
        <span itemprop='name'><%= @category.parent_category.name %></span>
      <% end %>
      &nbsp;
    <% end %>

    <%= link_to @category.url, itemprop: 'item' do %>
      <span itemprop='name'><%= @category.name %></span>
    <% end %>
  </h1>
  <br/>

  <% if params[:page].to_i == 0 && @subcategories.present? %>
    <div itemscope itemtype='http://schema.org/ItemList'>
      <% @subcategories.each do |subcategory| %>
        <div itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'>
          <meta itemprop='url' content='<%= subcategory.url %>'>
          <a href='<%= subcategory.url %>' itemprop='item'>
            <span itemprop='name'><%= subcategory.name %></span>
          </a>
          <% if subcategory.description.present? %>
            <span itemprop='description'><%= subcategory.description %></span>
          <% end %>
        </div>
      <% end %>
    </div>
    <br/>
  <% end %>
<% end %>

<div class='topic-list' itemscope itemtype='http://schema.org/ItemList'>
  <meta itemprop='itemListOrder' content='http://schema.org/ItemListOrderDescending'>
  <% @list.topics.each_with_index do |t,i| %>
    <div itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'>
      <meta itemprop='url' content='<%= t.url %>'>
      <a href='<%= t.relative_url %>' itemprop='item'>
        <span itemprop='name'><%= t.title %></span>
      </a>
      <span class="page-links"><%= page_links(t) %></span>
      <% if (!@category || @category.has_children?) && t.category %>
        <span class='category'>[<a href='<%= t.category.url %>'><%= t.category.name %></a>]</span>
      <% end %>
      <span class='posts' title='<%= t 'posts' %>'>(<%= t.posts_count %>)</span>
    </div>
  <% end %>
</div>

<% if @list.topics.length > 0 && @list.more_topics_url %>
  <div role='navigation' itemscope itemtype='http://schema.org/SiteNavigationElement'>
    <% if params[:page].to_i > 0 %>
      <span itemprop='url'><a href='<%= @list.prev_topics_url %>' rel='prev' itemprop='name'><%= t 'prev_page' %></a> &nbsp;</span>
    <% end %>
    <span itemprop='url'><b><a href='<%= @list.more_topics_url %>' rel='next' itemprop='name'><%= t 'next_page' %></a></b></span>
  </div>

  <% content_for :head do %>
    <% if params[:page].to_i > 0 %>
      <link rel="prev" href="<%= @list.prev_topics_url -%>">
    <% end %>
    <link rel="next" href="<%= @list.more_topics_url -%>">
  <% end %>
<% end %>

<%- end %> <!-- include_crawler_content? -->

<% if @rss %>
  <% content_for :head do %>
    <%= auto_discovery_link_tag(:rss, "#{Discourse.base_url}/posts.rss", title: I18n.t("rss_description.posts")) %>
    <%= auto_discovery_link_tag(:rss, { action: "#{@rss}_feed" }, title: I18n.t("rss_description.#{@rss}")) %>
  <% end %>
<% end %>

<% if @category %>
  <% content_for :head do %>
    <%= auto_discovery_link_tag(:rss, { action: :category_feed }, title: t('rss_topics_in_category', category: @category.name)) %>
    <%= raw crawlable_meta_data(title: @category.name, description: @category.description) %>
  <% end %>
<% else %>
  <% content_for :head do %>
    <%= raw crawlable_meta_data(title: SiteSetting.title, description: SiteSetting.site_description) %>
  <% end %>
<% end %>

<% if @title %>
  <% content_for :title do %><%= @title %><% end %>
<% elsif @category %>
  <% content_for :title do %><%= @category.name %><% end %>
<% elsif params[:page] %>
  <% content_for :title do %><%=t 'page_num', num: params[:page].to_i + 1 %><% end %>
<% end %>