anchor.diff:  
   The Availability score is calculated as:
   
  +[.text-center]
  +=====================================================================
   Availability = Alive Rate
  +=====================================================================
   
   [[freshness]]
   === 2.2 Freshness
  
positive.code: +
  Vocabulary Score is calculated as follows:
  +
  Vocabulary Score =
  latexmath:[\frac{\displaystyle \sum_{graphs}^{g}v(g)}{N}]
  
  
negative.code: +
  We evaluate Metadata score as follows:
  +
  [.text-center]
  =====================================================================
  Metadata Score =
  latexmath:[\frac{\displaystyle \sum_{graphs}^{g}(c(g) + l(g) + p(g) + d(g))}{N}]
  
  