xml << %(<?xml version="1.0" encoding="ISO-8859-1"?>\n)
xml.rss("version" => "2.0", "xmlns:dc" => "http://purl.org/dc/elements/1.1/") do
  xml.channel do
    xml.title("ROOL Documents: #{@book.name}")
    xml.link(home_url)
    xml.description "ROOL I2 Wiki: Tracking recent revisions for #{@book.name}"
    xml.language "en-us"
    xml.ttl "40"

    if pages = @book.pages.find(:all, :limit => 25, :order => "updated_at DESC")
      for page in pages
        updated = page.updated_at
        xml.item do
          xml.title("#{page.title}")
          xml.description("Last updated: #{updated.to_date.strftime('%B %e, %Y')}")
          xml.pubDate(updated.rfc822)
          xml.guid(page_url(:page_title => page))
          xml.link(page_url(:page_title => page))
        end
      end
    end
  end
end