# File rss/atom.rb, line 192
def validate_duplicate_links(links)
link_infos = {}
links.each do |link|
rel = link.rel || "alternate"
next unless rel == "alternate"
key = [link.hreflang, link.type]
if link_infos.has_key?(key)
raise TooMuchTagError.new("link", tag_name)
end
link_infos[key] = true
end
end