anchor.diff:    materialsTerms: [String!]!
     offerable: Boolean
     partnerIDs: [String!]!
  -  priceMax: Int
  -  priceMin: Int
     priceRange: String
     width: String
  -  widthMax: Float
  -  widthMin: Float
   }
   
   # Attributes for a search criteria
  
positive.code:   artistID: String
    atAuction: Boolean
    attributionClass: [String!]!
    attributionClasses: [String!]!
    colors: [String!]!
    dimensionRange: String
    dimensionScoreMax: Float
    dimensionScoreMin: Float
    height: String
    heightMax: Float
    heightMin: Float
    inquireableOnly: Boolean
    internalID: ID!
    locationCities: [String!]!
  
negative.code:   artistID: String = null
    atAuction: Boolean = null
    attributionClass: [String!] = []
    colors: [String!] = []
    dimensionRange: String = null
    height: String = null
    inquireableOnly: Boolean = null
    locationCities: [String!] = []
    majorPeriods: [String!] = []
    materialsTerms: [String!] = []
    offerable: Boolean = null
    partnerIDs: [String!] = []
    priceRange: String = null
    width: String = null
  }
  
  # A search criteria or errors object
  