[Year 12 SofDev] Internet in a DFD

[Mark Kelly]

Thanks to all for help nutting out DFDs.  I'm getting the hang of them 
in spite of some dodgy examples found in the ether that served to 
confound rather than to elucidate.

Timmer-Arends wrote:
> 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
>> 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.
>>
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> 
> _______________________________________________
> 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
> 
> 

-- 
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.