AN APPLICATION OF XML IN PDMS BASED ON WEB

In this paper, we talked about the three-layer system structure of PDM based on Web. In this structure, we mainly talked about the interface between database service and web service. We use XML language to realize the interface of visiting database. It is stored in XML documents of SQL lexical operating on data, and is unified managed in XML documents. It realizes the separation of the operation on database from the database. Programmer will not need to repeatedly write the operation lexical on database.