This paper presents a research in progress in the development of parametric models for geometric manipulation of complex shapes, and introduces a methodology for evaluation of the design instances of a parametric model. The research presents a case study on the designs of the Spanish architect Antonio Gaudi, and takes on the fundamental rules of the form generation of the nave columns of the Expiatory Temple of the Sagrada Familia in Barcelona. The evaluation is done applying two provisos that determine if a shape is part of the design language and is an instance of the parametric model is a Gaudinian design.