anchor.diff:  ### Get attribute data [GET /v2/entities/{entityId}/attrs/{attrName}{?type}]
   
   Returns a JSON object with the attribute data of the attribute. The object follows the JSON
  -representation for attributes (described in "JSON Entity Representation" section).
  +representation for attributes (described in "JSON Attribute Representation" section).
   
   Response:
   
  
positive.code: 
  ### Simple Location Format
  
  Simple Location Format supports basic geometries (*point*, *line*, *box*, *polygon*) and covers
  the typical use cases when encoding geographical locations. It has been inspired by
  [GeoRSS Simple](http://www.georss.org/simple.html).
  
  
negative.code:     + geometry: point (optional, string) - Geografical area to which the query is restricted.
        See [Geographical Queries](#geographical_queries).
      
      + coords: 41.390205,2.154007;48.8566,2.3522 (optional, string) - List of latitude-longitude
        pairs of coordinates separated by ';'. See [Geographical Queries](#geographical_queries).
      
      + limit: 20 (optional, number) - Limits the number of entities to be retrieved
      
  