In web-based education there is an emphasis on reusing and sharing instructional content due to the complexity of the development process of high-quality learning materials. It leads to the learning objects orientation as well as to partnerships among institutions to promote sharing of these objects. In order to allow local autonomy and less local effort when participating of this global environment, we developed LORIS, an integration system of learning objects? repositories. This system is based on the mediators and wrappers architecture, implemented through web-services. Our approach allows local autonomy and also an interoperable integrated view. LORIS is being adopted by PGL, an international partnership project for promoting web-based education.