Tree model for XML database and query
Dezhi Xu · Qiye jishu kaifa · 2003
The paper proposes some notions on XML documents and XML query. Then it formalizes the notions. These notions are ordered trees with labels for XML documents, a set of the trees for XML database and that answers for an XML query are homomorphism from query tree nodes to database nodes. In the end of the paper the significance of the work is explained.