(a) Design an XML schema for a Workflow.
  (b) Based on your design, write the XML representation for the Workflow below.
  (c) Design the SQL database schema for a Workflow.
  (d) In Java, implement a Graph data structure for a Workflow.
  (e) Write the SQL queries that are necessary for constructing a Graph object.
  (f)In Java implement an algorithm to number the Workflow steps in a depth-first-search order, such as the number sequence shown below.
  (g) What other DFS order sequences are possible for this graph? Why?

由于我还不能发图！另外还有一个工作流图我只能用文本写了

                                                   ->Finance Approval
Start->Request->Manager Approval                              ->Process Request->End
                                                   ->HR Approval
                                                
                                            Resubmit
  由于受限制有些箭头画不出来,我解释一下,这是一个公司内部的工作流图,所先是"Start" 发送一个"Request"给"Manager Approval "如果审批不通过转交给"Resubmit","Resubmit"再递交还给"Request"要求重发. 如果"ManagerApproal"审批通过,他就判断这个请求是给谁的然后决定是转发给"Finance Approval"还是"HR Approval". 这两个部门各自对这个请求进行审批，如果审批不能被当前部门通过的话，就要把请求递交给"Resubmit"，"Resubmit"再递交还给"Request"要求重发.如果审批通过则递交给"Process Request" 最后end"
还给出了每一个步骤的编号: start(1)  Request(2)  Manager Approval(3)  Finance Approval(4)  Process Request(5) End(6)   HR Approval(7)  Resubmit(8)
请告之你知道的部分答案也可以！非常感谢!!!