晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。   林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。   见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝)   既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。   南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。 sh-3ll

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DIR:/opt/alt/ruby27/share/ruby/rss/
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Current File : //opt/alt/ruby27/share/ruby/rss/syndication.rb
# frozen_string_literal: false
require "rss/1.0"

module RSS
  # The prefix for the Syndication XML namespace.
  SY_PREFIX = 'sy'
  # The URI of the Syndication specification.
  SY_URI = "http://purl.org/rss/1.0/modules/syndication/"

  RDF.install_ns(SY_PREFIX, SY_URI)

  module SyndicationModel

    extend BaseModel

    ELEMENTS = []

    def self.append_features(klass)
      super

      klass.install_must_call_validator(SY_PREFIX, SY_URI)
      klass.module_eval do
        [
          ["updatePeriod"],
          ["updateFrequency", :positive_integer]
        ].each do |name, type|
          install_text_element(name, SY_URI, "?",
                               "#{SY_PREFIX}_#{name}", type,
                               "#{SY_PREFIX}:#{name}")
        end

        %w(updateBase).each do |name|
          install_date_element(name, SY_URI, "?",
                               "#{SY_PREFIX}_#{name}", 'w3cdtf',
                               "#{SY_PREFIX}:#{name}")
        end
      end

      klass.module_eval(<<-EOC, __FILE__, __LINE__ + 1)
        alias_method(:_sy_updatePeriod=, :sy_updatePeriod=)
        def sy_updatePeriod=(new_value)
          new_value = new_value.strip
          validate_sy_updatePeriod(new_value) if @do_validate
          self._sy_updatePeriod = new_value
        end
      EOC
    end

    private
    SY_UPDATEPERIOD_AVAILABLE_VALUES = %w(hourly daily weekly monthly yearly)
    def validate_sy_updatePeriod(value) # :nodoc:
      unless SY_UPDATEPERIOD_AVAILABLE_VALUES.include?(value)
        raise NotAvailableValueError.new("updatePeriod", value)
      end
    end
  end

  class RDF
    class Channel; include SyndicationModel; end
  end

  prefix_size = SY_PREFIX.size + 1
  SyndicationModel::ELEMENTS.uniq!
  SyndicationModel::ELEMENTS.each do |full_name|
    name = full_name[prefix_size..-1]
    BaseListener.install_get_text_element(SY_URI, name, full_name)
  end

end