Application and Research of Subsumption in XML Types
Hong Xiao · 2003
Now research of XML's data has become a hot spot question. Understanding the relationship between these types can provide important information for manipulating this data. In this paper,we study partial sumption for XML types,and according to subsumption,being one to one , we propose the relation of partial sumption,being many to one , and a notion of least upper bound. In order to achieve the purpose of effective query, we merge many schemas in the real query question