A XML Update Pattern Based on XQuery Update Facility and Seamlessly Integrated with Relational Databases

With the promotion and application of XML standards, The research hotspot in database domain has emerged, namely, how to effectively manage the large-scale XML data. XQuery Update Facility, which proposed by W3C in 2008 has become the grammar and semanteme standard for the realization of XML data updating. Based on this standard, this paper presents a XML update pattern which seamlessly integrated with relational database. Firstly, according to W3C´s XDM model, define the XML node operation model and propose the grammar format of Insert, delete, rename and replace operations; secondly, present a mixture update schema for XML type data and relational type data. In the schema, the structure to restore the XML type data is defined and the function of XML data update is implemented. The experiments on this scheme show that XML update grammar fully supports W3C update specification, has the natural grammar format and apts to seamlessly integrate with relational database.