1 | require "rss/1.0"
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2 | require "rss/dublincore"
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3 |
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4 | module RSS
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5 |
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6 | TAXO_PREFIX = "taxo"
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7 | TAXO_URI = "http://purl.org/rss/1.0/modules/taxonomy/"
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8 |
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9 | RDF.install_ns(TAXO_PREFIX, TAXO_URI)
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10 |
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11 | TAXO_ELEMENTS = []
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12 |
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13 | %w(link).each do |name|
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14 | full_name = "#{TAXO_PREFIX}_#{name}"
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15 | BaseListener.install_get_text_element(TAXO_URI, name, "#{full_name}=")
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16 | TAXO_ELEMENTS << "#{TAXO_PREFIX}_#{name}"
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17 | end
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18 |
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19 | %w(topic topics).each do |name|
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20 | class_name = Utils.to_class_name(name)
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21 | BaseListener.install_class_name(TAXO_URI, name, "Taxonomy#{class_name}")
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22 | TAXO_ELEMENTS << "#{TAXO_PREFIX}_#{name}"
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23 | end
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24 |
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25 | module TaxonomyTopicsModel
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26 | extend BaseModel
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27 |
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28 | def self.append_features(klass)
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29 | super
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30 |
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31 | klass.install_must_call_validator(TAXO_PREFIX, TAXO_URI)
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32 | %w(topics).each do |name|
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33 | klass.install_have_child_element(name, TAXO_URI, "?",
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34 | "#{TAXO_PREFIX}_#{name}")
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35 | end
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36 | end
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37 |
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38 | class TaxonomyTopics < Element
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39 | include RSS10
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40 |
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41 | Bag = ::RSS::RDF::Bag
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42 |
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43 | class << self
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44 | def required_prefix
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45 | TAXO_PREFIX
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46 | end
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47 |
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48 | def required_uri
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49 | TAXO_URI
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50 | end
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51 | end
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52 |
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53 | @tag_name = "topics"
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54 |
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55 | install_have_child_element("Bag", RDF::URI, nil)
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56 | install_must_call_validator('rdf', RDF::URI)
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57 |
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58 | def initialize(*args)
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59 | if Utils.element_initialize_arguments?(args)
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60 | super
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61 | else
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62 | super()
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63 | self.Bag = args[0]
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64 | end
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65 | self.Bag ||= Bag.new
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66 | end
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67 |
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68 | def full_name
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69 | tag_name_with_prefix(TAXO_PREFIX)
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70 | end
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71 |
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72 | def maker_target(target)
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73 | target.taxo_topics
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74 | end
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75 |
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76 | def resources
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77 | if @Bag
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78 | @Bag.lis.collect do |li|
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79 | li.resource
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80 | end
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81 | else
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82 | []
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83 | end
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84 | end
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85 | end
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86 | end
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87 |
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88 | module TaxonomyTopicModel
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89 | extend BaseModel
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90 |
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91 | def self.append_features(klass)
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92 | super
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93 | var_name = "#{TAXO_PREFIX}_topic"
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94 | klass.install_have_children_element("topic", TAXO_URI, "*", var_name)
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95 | end
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96 |
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97 | class TaxonomyTopic < Element
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98 | include RSS10
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99 |
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100 | include DublinCoreModel
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101 | include TaxonomyTopicsModel
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102 |
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103 | class << self
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104 | def required_prefix
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105 | TAXO_PREFIX
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106 | end
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107 |
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108 | def required_uri
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109 | TAXO_URI
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110 | end
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111 | end
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112 |
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113 | @tag_name = "topic"
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114 |
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115 | install_get_attribute("about", ::RSS::RDF::URI, true, nil, nil,
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116 | "#{RDF::PREFIX}:about")
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117 | install_text_element("link", TAXO_URI, "?", "#{TAXO_PREFIX}_link")
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118 |
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119 | def initialize(*args)
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120 | if Utils.element_initialize_arguments?(args)
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121 | super
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122 | else
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123 | super()
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124 | self.about = args[0]
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125 | end
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126 | end
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127 |
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128 | def full_name
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129 | tag_name_with_prefix(TAXO_PREFIX)
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130 | end
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131 |
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132 | def maker_target(target)
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133 | target.new_taxo_topic
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134 | end
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135 | end
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136 | end
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137 |
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138 | class RDF
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139 | include TaxonomyTopicModel
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140 | class Channel
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141 | include TaxonomyTopicsModel
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142 | end
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143 | class Item; include TaxonomyTopicsModel; end
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144 | end
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145 | end
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