A Domain Integrity Constraint Control for XML Documents.
Alexandre Tagliari Lazzaretti, Ronaldo dos Santos Mello · Brazilian Symposium on Databases · 2005
Integrity constraints for XML documents are mainly defined through XML schemas: DTD and XML Schema. However, XML schemas do not have support for all existing kinds of domain integrity constraints in SQL databases. This paper presents a control called XDC that aims at supporting domain integrity constraints that cannot be handled by XML schemas. It is composed by an XML language for domain integrity constraint specification, called XDCL, and an XDCL parser that validates such constraints. XDCL allows specifying conditions and executing actions, as in SQL databases. XDC is an independent mechanism that can be used by users, applications or XML databases to validate domain integrity constraints.