EN
Given a real analytic manifold Y, denote by $Y_{sa}$ the associated subanalytic site. Now consider a product Y = X × S. We construct the endofunctor $ℱ ↦ ℱ^{S}$ on the category of sheaves on $Y_{sa}$ and study its properties. Roughly speaking, $ℱ^{S}$ is a sheaf on $X_{sa} × S$. As an application, one can now define sheaves of functions on Y which are tempered or Whitney in the relative sense, that is, only with respect to X.