anchor.diff:  +
   Ontology Score is calculated as follows:
   +
  +[.text-center]
  +=====================================================================
   Vocabulary Score =
   latexmath:[\frac{\displaystyle \sum_{graphs}^{g}o(g)}{N}]
   
  
positive.code: latexmath:[N] = Number of Graphs
  
  latexmath:[v(g)] = Number of Properties in Graph g
  * Ontology Score
  +
  Ontology Score, which is calculated based on metadata, represents how
  
negative.code: 
  The Availability score is calculated as:
  
  [.text-center]
  =====================================================================
  Availability = Alive Rate
  =====================================================================
  
  [[freshness]]
  === 2.2 Freshness
  