Priyanka,
I think you would benefit by reading some of the older DFD text books about. Now Ed Yourdon, being the gentleman that he is, has made one of his older and still relevant books available on the internet in a Wiki. see http://www.yourdon.com/strucanalysis/index.html
When you read this text, you'll understand what was meant by things like "the essential data flows - that are technology independent"
There was a UK training company that had a tutorial on their website about using DFDs and Use-cases, if and when I remeber, I'll post it.
warm regards,
K
The company is Volere. check them out at http://www.volere.co.uk/ .They seem to have some good stuff; they also seem to know what they're doing
Hi:
Message content are one type of data flow.
Tony
Priyanka:
To see some simple dfd's go to this site's home page, and under Featured Articles, go into "The How To of Essential Modeling".
brought to you by enabling practitioners & organizations to achieve their goals using:
enabling practitioners & organizations to achieve their goals using: