1 SPHINX : Schema Integration by Example

We focus on the problem of semi-automated query discovery for XML views without requiring the intervention of an expert to guarantee a correct final result. Given multiple independent sources of heterogeneous XML data structures, our tool, SPHINX, lets a nontechnical user define views using example -based, graphical, interaction. SPHINX embodies a syntactically derived meta-model of federating view definitions. The meta-model of federating view definitions enables, first, an active-learning method which removes the burden of generating the examples from the user. Second, SPHINX can identify when the learned view definition converges to a vetted, semantically accurate result. Thus, the users do not need to verify the correctness of the transformation.