[Year 12 SofDev] Internet in a DFD

[Kevork Krozian]

Hi Mark,

 My view is that the method of delivery is irrelevant when data flows are 
drawn simply because it is a logical diagram.
Whether an order comes on paper, snail mail, fax, email, web page or 
telephone is irrelevant (  as opposed to a system flowchart that would have 
a physical diagram of the components and processing ) . All that is needed 
is a data flow from customer to a process eg. Accept order.

Best wishes

Kevork Krozian
Mailing List Creator and Administrator
kevork at edulists.com.au
www.edulists.com.au
Tel: 0419 356 034
----- Original Message ----- 
From: "Mark Kelly" <kel at mckinnonsc.vic.edu.au>
To: "Year 12 Software Development Teachers' Mailing List" 
<sofdev at edulists.com.au>
Sent: Monday, March 19, 2007 2:59 PM
Subject: [Year 12 SofDev] Internet in a DFD


> Hi all.  When putting the internet into a DFD, does it count as an 
> external entity?  Or doesn't it matter, logically speaking?
>
> Is it treated as just another data store or data source/destination: e.g. 
> an order arrives from external entity (the customer) without caring how it 
> arrived?
>
> I may have answered my own question...
>
> -- 
> Mark Kelly
> Manager - Information Systems
> McKinnon Secondary College
> McKinnon Rd McKinnon 3204, Victoria, Australia
> Direct line / Voicemail: 8520 9085
> School Phone +613 8520 9000
> School Fax +613 95789253
>
> Webmaster - http://www.mckinnonsc.vic.edu.au
> IT Lecture notes: http://vceit.com
> Moderator: IT Applications Mailing List
>
> There are 10 kinds of people in the world: those who understand binary
> and those who don't.
>
> _______________________________________________
> http://www.edulists.com.au
> IT Software Development Mailing List kindly supported by
> http://www.vcaa.vic.edu.au - Victorian Curriculum and Assessment Authority 
> and
> http://www.vitta.org.au  - VITTA Victorian Information Technology Teachers 
> Association Inc
>