Three characteristics seem to be most significant for the purposes of this study; these are the requirements under which professional practitioners are expected: — to have undergone training to a high standard, — to conform with demanding ethical standards, — and, on this basis of training and discipline, to provide a service in the context of a direct relationship.
Adoptaremos para este análisis las tres características siguientes que nos parecen ser las más significativas: el profesional liberal ha de: — poseer una formación de un nivel elevado — responder a una ética exigente — y sobre esta base de formación y de disciplina, prestar un servicio en el marco de una relación personal.