Abstract. Given a quasicompact, quasiseparated scheme X, a bijection between the tensor localizing subcategories of finite type in Qcoh(X) and the set of all subsets Y ⊆ X of the form Y = i∈Ω Y i , with X \ Y i quasicompact and open for all i ∈ Ω, is established. As an application, an isomorphism of ringed spacesis constructed, where (spec(Qcoh(X)), O Qcoh(X) ) is a ringed space associated with the lattice of tensor localizing subcategories of finite type. Also, a bijective correspondence between the tensor thick subcategories of perfect complexes D per (X) and the tensor localizing subcategories of finite type in Qcoh(X) is established. §1. IntroductionIn his celebrated paper [1] on Abelian categories, Gabriel proved that for any Noetherian scheme X, the assignments Given a quasicompact, quasiseparated scheme X, let D per (X) denote the derived category of perfect complexes. It comes equipped with a tensor product ⊗ := ⊗ L X . A thick triangulated subcategory T of D per (X) is said to be a tensor subcategory if for every E ∈ D per (X) and every object A ∈ T , the tensor product E⊗A is also in T . Thomason [6] established a classification similar to (1.1) for the tensor thick subcategories of D per (X) in terms of the topology of X. Hopkins and Neeman (see [7,8]) did the same in the case where X is affine and Noetherian.On the basis of Thomason's classification theorem, Balmer [9] reconstructed the Noetherian scheme X out of the tensor thick triangulated subcategories of D per (X). This result was generalized to quasicompact, quasiseparated schemes by Buan-Krause-Solberg [2].