To conclude this chapter, we will develop another bookstore BPEL process. This time, this will be the BookstoreBBPEL process. Compared to the first version, we will use a more sophisticated data manipulation. Instead of returning a constant stock quantity for each book, we will return a different stock quantity for several different book ISSNs. We will hardcode the results but will get familiar with branches, with the XPath expressions, and will use the assigns to manipulate variables.