Probabilistic XML data exchange: An algorithm for materializing probabilistic solutions

Data exchange is the problem of finding an instance of a target schema, given an instance of a source schema and a specification of the relationship between the source and the target. In this paper, we look into the basic properties of XML data exchange in the presence of probabilistic data. This requires rethinking the very basic concepts of traditional XML data exchange, such as solution, universal solution, and certain answers of target queries. We develop a framework for XML data exchange over probabilistic XML documents, and give a polynomial-time materializing algorithm that computes target probabilistic documents.