# File lib/html5/filters/validator.rb, line 298
  def validate_start_tag(token)
    check_unknown_start_tag(token){|t| yield t}
    check_start_tag_required_attributes(token) do |t|
      yield t
    end
    check_start_tag_unknown_attributes(token) do |t|
      yield t
    end
    check_attribute_values(token) do |t|
      yield t
    end
  end