Application Of XML Technique In The PDM Documents Management

Product Data Management (PDM), based on the software is a new management thought and technique. It manages all the product information, such as electronic documents, digital documents and database records as well as the product processes, such as the workflow and change flow.It provides the management of product information on the whole lifecycle, and establishes the parallel environment of cooperation for designing and manufacturing products within the scope of enterprise.The following are five greatest functions of PDM:Documents Management, Product Construction and Configuration Management, Work Flows and Processes Management, Spare Parts Classification Management and Query, and Items Management.In the Documents Management model of the PDM system, there are a great many of documents data to be organized and managed. One of the problems, which need to be solved, is how to efficiently manage these data so that all the applied system can share the data conveniently.The XML has the characteristics of the separation of contents and forms, which does not describe the data manifestation but the data contents and the logic relations.The XML brings up a new solution to manage, exchange and share the data for its good expansibility, self-description, opening, and interoperability.This paper is mainly concerned with the application of XML technique in order to reach the efficiency in data managing, exchanging and sharing. It brings up using XML to describe the relation data in the related database,inand it combines XML and XSL, Java Bean and JSP to respond the internet user's request to query, count, add, delete company information. This paper also gives an example of contracts, which can query the last contract information of the company, count contract check, query the process information of contract, and look up the primitive contracts.The SVG (Scalable Vector Graphics) is an XML-based application. In order to adapt the development of Internet Web applications, the W3C organization establishes this XML-based scalable vector graphics language, which can describe 2D vector graphics and vector/raster graphics. SVG has many strongpoints, such as the smaller file, the faster speed, and the more convenient search and location of the graphic element.This paper compares strongpoints with shortpoints of the AutoCAD web issue format, and brings up a method of using the SVG to describe the architecture blueprints to realize the web issue of them. This paper discusses the possibility of converting the AutoCAD DWG format documents to the 2D graphics documents described with SVG elements, so it will be more convenient to query and view the 2D architecture blueprints of CADS in the Web-based PDM system. It also gives out a method torn convert DWG files to SVG files and an example to show the method and step of convertion, and it also compares DWG documents with SVG documents to confirm the possibility of using the SVG.In the first chapter, it mainly focuses on the basic concepts, basic functions, and main function models of PDM, reviews the development of PDM, views the future of PDM, and summarizes the profit of practice PDM in the enterprise.In the second chapter, it primarily introduces a PDM system developed for an architecture enterprise, brings up the system construction mixed with B/S and C/S, and introduces the main function models of the system, andIVthe details of each model.In the third chapter, the XML and related technique are concerned. It reviews the foregound of XML, and analyzes the characteristics of it. At the same time, it attempts torn make a prediction of its application. Then, it offers the steps of its application and makes comparision between the DTD and Schema, the parser of SAX and DOM. Finally it tries to use CSS and XSL to browse the XML documents.In the forth chapter, it mainly concerned with the relation of XML and Java. In the analysis of the relation of XML and database, it gives a method to convert relation data to XML documents, finally, it gives a...