Question : data flow Diagram

i am a begginer and i want to learn how to make dataflow diagram  step wise with some good example .i have search on google but i could not find good site..do you people know any site from there i can get it?
regards
friend

Answer : data flow Diagram

There are a few sites that will get you on track.

http://spot.colorado.edu/~kozar/DFDtechnique.html   --- is a good site, generic overview, basic shapes covered.
http://www.schools.ash.org.au/olshc/infotech/dataflow.htm
http://www.doc.mmu.ac.uk/online/SAD/T04/dfds.htm --- this one covers context diagram, important parts of the DFD
http://wwwhome.cs.utwente.nl/~roelw/OIS/chapter15-handout.pdf

Thats a start. I just did a search for Data Flow Diagram on Google. If you want anymore let me know, I'd be happy to help.