/** Retorna un clon de la clave actual */
virtual Clave *Clone () const = 0;
virtual bool operator < (const Clave &k) const = 0;
virtual bool operator == (const Clave &k) const = 0;
virtual operator std::string () const = 0;
/** Retorna un clon de la clave actual */
virtual Clave *Clone () const = 0;
virtual bool operator < (const Clave &k) const = 0;
virtual bool operator == (const Clave &k) const = 0;
virtual operator std::string () const = 0;