def property(type)
      prop = Persona.mappings.detect { |i| i[1].include?(type) }
      prop ? self.send(prop[0]).to_s : nil
    end
def property(type)
      prop = Persona.mappings.detect { |i| i[1].include?(type) }
      prop ? self.send(prop[0]).to_s : nil
    end
Returns the personas attribute for the given SReg name or AX Type URI