Generating Nested XML DTD From Non Normalized Relational Views

Document Type Definition (DTD) is very important because it contains a set of rules that specifies and captures the structure of XML (eXtensible Markup Language) document. Most of the current approaches for generating DTD from relational views do not support nested elements for DTD. Furthermore, these approaches may not generate automatically DTD from flat relational views where they depend on what is submitted by users. This paper investigates how nested XML DTD that support nested elements can be automatically generated from flat relational view. The proposed approach is based on the number of data values for each column in nested view that is generated from flat relational view.