The aim of this thesis is to account for the importance of the Web from a philosophical point of view. In a twofold fashion: as an object for research that, in the wake of the Semantic Web and Webarch, in different ways, is obviously consonant with many classical issues in metaphysics and the philosophy of language. From this perspective, we study some of its main building blocks (URI, resources, tags, etc.). Along with this aspect, we underline its importance as regards what's becoming of philosophy itself. This is all the more important since the task at hand demanded that we did not project philosophical categories a priori and lend ourselves to commit the "inscription error" acutely described by Brian Cantwell Smith, by resorting to a form of philosophia perennis. Conversely, we tried to focus our attention on Web architects themselves in order to bring their empirical metaphysics to the forefront, observing the controversies to which it lent itself. By acknowledging the « ontogonic » scope of such a practice as « philosophical engineering », an expression coined by no other than Tim Berners-Lee himself, understood as the production of new distinctions and entities like resources in a world that unfolds, we were made to ponder broader topics like the nature of objectivation. In the end, this gave rise to politic al concerns in line with the establishment of a shared world, in which the Web is heavily involved.
