word_class.rb in zenlish-0.2.00

- old
+ new
@@ -1,20 +1,35 @@
 require 'rley'
+require_relative '../feature/feature_struct_def_bearer'
 
 module Zenlish
   module WClasses
     # Also known as: part of speech, syntactic category or word category.
     # A word class represents a group of word which have similar functions.
     # Word classes are divided into:
-    # - Lexical words (?? same as content words??) such as nouns, verbs, adjectives, adverbs
-    #   Content words carry the meaning of a sentence
-    # - Function words (?? same as structure words??) such as pronouns, determiners, modal verbs, 
-    #  auxiliary verbs,
-    #   Structure words structure a sentence
+    # - Lexical words (?? same as content words??) such as nouns, verbs, adjectives,
+    #   adverbs. Content words carry the meaning of a sentence for the chosen discourse
+    #   universe.
+    #
+    # - Function words (?? same as structure words??) such as pronouns, determiners,
+    #   modal verbs, auxiliary verbs. Structure words helpt to structure a sentence.
+    #   They working is independent of the chosen discourse universe.
     #   conjunctions and prepositions
     class WordClass < Rley::Syntax::Terminal
+      include Feature::FeatureStructDefBearer
+      # @return [Hash] pair of the kind: String => InflectionTable
+      attr_reader :paradigms
+
       def initialize
         super(self.class.name.split('::').last)
+        init_struct_def(nil, {})
+        @paradigms = {}
       end
+
+      # Indicates whether all words from the word class have a single (uninflected)
+      # form.
+      def invariable?
+        raise NotImplementedError, "Missing implementation for #{self.class}."
+      end
     end # class
-  end # module    
+  end # module
 end # module
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