Towards a high integrity XML link update in object-relational database

With the increasing usage of XML database, XML update has become an important issue in the database community. How updates affect the XML documents need to be investigated further. In this paper we propose a methodology to maintain the integrity of updated XML documents by maintaining the consistency of XML Link. XLink and its subsequent XPointer are W3C standards and used to provide referential purpose among XML documents or nodes. Since XML Link is embedded as an attribute in an XML instance, our proposal can be used for schema-less documents and for instance-based references. Our proposal is targeted for Object-Relational Storage, one of the most widely used repositories for XML document. While the XML documents are stored as a CLOB XML Type, our update methodologies are implemented as a set of functions that perform checking mechanism before updates.