# File lib/html5/filters/validator.rb, line 769
  def validate_attribute_value_a_ping(token, tag_name, attr_name, attr_value)
    value_list = parse_token_list(attr_value)
    for current_value in value_list
      checkIRI(token, tag_name, attr_name, attr_value) do |t|
        yield t
      end
    end
  end