Language fragment

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A language fragment is a subset of the group of proper sentences of a language. A proper fragment contains only valid sentences.

An example for a small fragment of English:

  1. Syntax: S -> N V
  2. Lexicon: N = {'I', 'John'} , V = {'walked', 'slept'}

This fragment contains 4 sentences. 2 of them are 'I slept' and 'John walked'.