The configuration of the urban systems is a central theme on the urban and regional studies.
This article contributes to accommodate the terms of hierarchy, network, polycentrism
and complexity when it comes to understand those mechanisms (the urban systems).
The most important characteristics of the hierarchical structures transition to the
reticular systems are considered and the dichotomy between segment and integrate the
elements that comprise the urban systems is analysed. Therefore, the urban linkages
are viewed through the lens of the complex systems. To focus on one of the components
(both when interpreting and intervening) is reductive and increases the risks of destroying
the evident (or latent) development potential in the network of local-regional-
-global relationships.