Resumen
The classification of uses is one of the central issues of urban planning, since it is only by referring to groups of uses that we can achieve the simplification and, ultimately, the understanding of urban space. However, contemporary planning theory has shown very little interest in a theoretical approach to this issue. The present paper addresses the issue by integrating it into the development of an analytical theory of urban uses which it calls urbanology. Specifically, the paper starts with the description of the basic concepts and processes of classification, which are then employed to produce a general theoretical classification of urban uses. Since the classification of uses is not only a question of theoretical importance, but directly related to applied planning, the paper concludes with the elaboration of a second, alternative classification which satisfies the needs of contemporary planning practice.