The genre's greatest practitioners belonged to the Canal and Guardi families of Venice.

Disciplines are defined and recognized by the academic journals in which research is published, and the learned society and academic departments or faculties to which their practitioners belong.

Wizards and practitioners of magic related to them possibly belong more to fantasy than they do supernatural although they do exist in both genres although in fir supernatural genre their mythology/background are often reworked to fit the genre more appropriately.

Although professional associations prescribe high standards of training and hygiene, most practitioners of piercing do not belong to these groups and do not adhere to their standards, Dr. Armstrong said.

As with interior design, however, not all skillful practitioners belong to an organization.

Since it carries no explicit philosophical commitment, its practitioners may not belong to any particular school of thought.