The problem ...We work for stakeholders who managed a database of books They have requirements What even is a pipeline? A pipeline is a program is focused on composition: programs that take inputs from the outputs of other programs, or even other pipelines. XProc is a XML pipelining technology. XProc has two predominant implementations:XML Calabash is for XProc 1.0 MorganaXProc-IIIse is for XProc 3.0