1. DFD Symbol Tamil
S.Sakthybaalan 22.11.2014 Page 1 of 2
Entity Source Sink .
Produces : , , ,
Consumes : , , ,
Source : , , , ,
Sink : , ,
Entity Source .
Entity Sink .
Source/Sink (Entity):
1. , Source (Entity) Sink (Entity)
. Process .
2. Source Sink (Noun)
(Label) .
Process :
1. Process . Object
Source
.
2. Process .
sink .
3. Process (Verb) (Label)
.
2. DFD Symbol Tamil
S.Sakthybaalan 22.11.2014 Page 2 of 2
Data Store:
1. (Data), Data store Data store
.
2. Data store
. Process ( (Data)
) Data store .
3. Data store (Noun) (Label)
.
Data flow :
1. Data flow symbols (One direction)
.
2. Process Data store
( Data store Check
(Read before an update).
3. Data flow , symbol .
4. Data store data flow Update (Update or change).
5. Data store data flow (Retrieve or use) .
6. Data flow (Noun) (Label)
.
Adapted from Celko, 1987