construct a process model

2004/6/Q1.1.b
When an application form is received from an Applicant, a Clerk enters the information on the form into the system. As it is entered, it is validated against Job details to ensure that the Applicant is applying for a valid Job. Once details have been entered they are stored on an Applicant database. Overnight a batch process is run to send an acknowledgement letter to each Applicant. The date that the letter is sent is noted on the Applicant details held in the system.
答案提供的是flowchart，用DFD怎么解呢

<P>flowchart</P>
<P>&nbsp;</P>
<P>&nbsp;</P>

<P>其实DFD和flowchart的画法很相近</P>
<P>&nbsp;external entity：applicant </P>
<P>process: enter, store, send </P>
<P>data store: job, applicant </P>
<P>data flow: 与图中的7个箭头完全一致</P>