[Year 12 SofDev] Internet in a DFD

[Timmer-Arends]

if the internet were being used somehow to generate data then it would be
considered a source. If it's being used to move data from process A to
process B; or from/to Process X to/from a data store; or from/to Process X 
from/to an external entity, then its just the physical implementation of a 
logical data flow; ie on a logical DFD it's just a line labelled with the 
data flowing 'through' it

Regards
Robert T-A
Brighton SC

----- 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
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