Conversion Of Xml And Object Databases

With rapid developing of Web, XML is becoming the standard format for data exchange between applications on the Internet. The flexible data model and open access characterstics of XML can provide powerful for the Information Intergration Systems, so XML-based Information Intergration is much fitter for Data Interchanging and sharing than traditional Systems, and has attracted various efforts in the past decades. Recently, many researchers have addressed the problem of storing XML data and processing XML queries using traditional database engines. Here, most of them have used relational database systems, while we show in this paper that object-oriented database systems can be another solution, which is to construct the wrapper between Object-Oriented Database and XML.Based on XML-based Information Intergration Systems, this paper maily proposes how to construct the wrapper between Object-Oriented Database and XML automaticly and fastly. Firstly, it presents the storing arithmetic based on the mapping policy between XML Data modal and Object-Oriented modal. Reference to the arithmetic of extracting Object-Oriented Database Schemas from XML DTDs using Inheritance and other commercial tools for XML storing , it improves mapping policy from xml to object , which optimizes the new semantic classes, what's more, it present object clustering policy to resolve the uncertainty of XML schema and the complexity of information intergration, which simultaneously focuses on the semanteme and structure of new object classes. On the other hand , it presents method to realize exchanging from object to XML. Last, it presents querying and data maintaing arithmetic to grasp data information correctly and maintain the wrapper effectivly ground on this storing one , which processes user requests such as XML querying, updating and deleting .