[Year 12 SofDev] ER diagrams v data structure diagrams for 2011

[Allan Barnes]

Hi Maggie

Pretty well correct - a data structure diagram is the overall description of
data elements in an IS.

There are two main types of data structure diagrams - an ER diagram, which
is a network model diagram that describes the stored data layout of an
information system - it is therefore a subset of a data structure diagram,
and the DFD (data flow diagram) which describes the flow of information
around an IS (which were in the old Program Guide). Wikipedia has a good
representation of it.

http://en.wikipedia.org/wiki/Data_structure_diagram 

 

Hope this helps. ER diagrams and DFD's were post grad IT units when I
studied it many moons ago. Difficult concepts for students to grasp.

 

 

Kind regards

 

Allan Barnes, CEO

Australian Institute of Education and Training

P.O. Box 171

Brunswick West 3055

Melbourne, Victoria

Ph: (03) 9387 2051

FAX: (03) 9387 3470

Mobile: 0409 428 221

 

 

 

 

 

From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au]
On Behalf Of Margaret Iaquinto
Sent: Thursday, 4 November 2010 11:39 AM
To: sofdev at edulists.com.au
Subject: [Year 12 SofDev] ER diagrams v data structure diagrams for 2011

 

In the study design for 2011, a KK includes data structure diagrams and ER
diagrams. Looking on the Web for some help, it appears they are similar and
perform similar functions. Perhaps the ER diagram is a subset of the data
structure diagram. Haven't fully grasped this yet.

 

ER diagrams are found in ITA in 2011.

 

So, can someone supply a way to differentiate the two? Or even websites for
examples?

 

thanks

 

Maggie

 

 

Margaret Iaquinto

Information Technology Coordinator

 

St Leonard's College

Brighton Campus

t (+61 3) 9909 9300

 

x 529

 

www.stleonards.vic.edu.au <http://www.stleonards.vic.edu.au/> 

 



 

 

Alternate email: maggie at iaquinto.net


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