attribute symbol to business management ywgl component class symbol 39 s product serial number attribute symbol fig3 shows a completed production serial number assignment transfer view whose construction process is similar to that of the u201c business operation loop transfer view u201d and the content thereof contains the following transfer symbols from business management ywgl component class symbol 39 s product serial number attribute symbol to production serial number assignment action symbol 39 s input attribute symbol and from production serial number assignment action symbol 39 s output attribute symbol to production management scgl component class symbol 39 s product serial number attribute symbol fig3 shows a completed purchase instance creation transfer view whose construction process is similar to that of the u201c business operation loop transfer view u201d and the content thereof contains the following transfer symbols from the purchase management cggl component class symbol 39 s name attribute symbol to purchase instance creation action symbol 39 s type attribute symbol and from purchase product type quantity attribute symbol of business management ywgl component class symbol to purchase instance creation action symbol 39 s instance quantity attribute symbol fig3 shows a completed purchase configuration traversal transfer view whose construction process is similar to that of the u201c business operation loop transfer view u201d and the content thereof contains the following transfer symbols from purchase management cggl component class symbol 39 s name attribute symbol to purchase configuration traversal action symbol 39 s type attribute symbol fig4 shows a completed purchase serial number increment transfer view whose construction process is similar.