The method of how CAPP obtains attribute information, structure information and figure information of the products from PDM’s database in the PDM integrated frame is discussed. At the same time, the format and type of data-document in CAD/CAPP/PDM system are studied and documents in different format are
divided into the unformatted document and formatted one. A model and application instance that how process document , process key-element and attribute information stores CAPP data are explained in detail.