anchor.diff:  values, all these values will be used as alternative categories.
   
   [float]
  -==== Category Mapping
  +===== Category Mapping
   
   The mapping for a category is simply defined by its `default` values. These can either be
   defined as list of *default* categories:
  
positive.code: --------------------------------------------------
  
  [float]
  ==== Category Query
  A query within a category works similar to the configuration. If the value is `null`
  the mappings default categories will be used. Otherwise the suggestion takes place
  for all documents that have at least one category in common with the query.
  
negative.code: --------------------------------------------------
  
  [float]
  ===== Geo location Config
  
  Within a document a geo location retrieved from the mapping definition can be overridden
  by another location. In this case the context mapped to a geo location supports all
  