The main purpose of this paper is to contextualize the access to the huge amount of results and reports that a Hospital Information System (HIS) can reach to have. Our target is to integrate a semantic layer with the HIS, so that the user can employ this layer to access just the precise information needed, under his working context. Here we propose a new navigation system based on the semantic characteristics of the data acceded, their complementary characteristics, properties and relations, providing so the HIS with a new tool to solve an evident problem for the users.