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Questions tagged [dataflow-diagram]

Data flow diagrams are graphical representations of the flow of information through a system. Use this tag for any questions relating to DFDs, their features and uses, and suitability in different circumstances.

A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process. A DFD is often used as a first step to create an overview of the system, which can later be elaborated on. They can also be used for the visualization of data processing, as part of a structured design process.

A DFD shows the information that will be input to and output from the system, where the data comes from and goes to, and where the data is to be stored. It does not show information about the timing of the process, or information about whether processes will operate in sequence or in parallel.

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Linked list in data flow diagram

Is this correct? What i basically want to ask is that- Is it correct to consider a linked list as a data source. What happens in this program is that a text files contents are loaded into memory in a linked list. Which does all the processing work…
Indranil Mondal
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How to Turn DFD into Code?

I'm learning about software engineering and design right now, and after reading some books and articles, there's still some things that I don't really get. Mainly, like the title says, suppose we have finished design our database (with ER Diagram as…
bertzzie
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Data Flow Diagram (DFD) Question about how to link caching system with the main API

I’m trying to build a DFD diagram but I was confused about caching system which is used to make the data run faster. Is the diagram below in correct order or should I make another link from caching system to the database?
Ahmed Ala
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How to show tracking in a user flow diagram?

I have made a user flow diagram but just wanted to ask you guys about clarification on displaying "tracking". Let's say these are the requirements User enters a web page to browse products User selects product The selected product is tracked by…
ThomasGXS
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Recreating Process Flow in Python NetworkX

Would anyone know how to recreate this flow chart in networkx? I know I can manually add these nodes and add the edges, but I wanted to write some code that could be applicable for other data types like CSV or EXCEl. My main idea was to convert this…
Sahil Merali
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How to represent a duplicate data store in a data flow diagram (DFD) using Yourdon DeMarco notation?

While searching for the answer, I found that in the Gane & Sarson notation, duplicate data stores are indicated by adding an extra line. Another website suggested adding an asterisk next to the data store name. However, I was unable to find any…
Ice
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Data Flow Diagrams (DFD) modeling doubts

I have some doubts about what would be the most correct way of modelling some things in DFDs. I have the following requirements for a system for a hospital: "All doctors agendas will available for patients in the website. The patient will be able…
asugomez
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What kind of diagram is on the Google Calendar API website?

The Google Calendar API documentation has the below diagram. What kind of diagram is this and how do I interpret the different arrows.
OrigamiEye
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Can attributes be used with entitiy titles on data flow diagrams?

All. I'm trying to diagram the flow of data between several large, complex systems. I'm putting each system on the data flow diagram as an entity. I also would like to show which entities are public facing, and which are internally facing. Is it…
Tom C
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Any intellij plugin or software that shows methods usage from class

So I have lots of code and It is hard to catch up the flow of it. I would like to know how I can have a diagram where I can see one class and all the methods it is using from other classes. I checked code iris and sequence diagram. I see sequence…
legend12345
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Which echart diagram can be used for something like a process flow diagram?

I am trying to implement a flow diagram using echarts library by Baidu. I thought the closest match for it, would be the tree diagram. Here's an example: Tree Kindly suggest some other diagram which would portray a flow diagram better. The diagram…
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dataflow code path value range analysing

I need to determine the possible value range of a variable in a specific line of code. In a complex project this can be very tedious and error prone. Thats why i seek a possibility to automate this task. Imagine the following easy code…
Philipp Michalski
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Data Flow/Process Diagram Query

I'm looking to depict a flow of data which shows the following: Booking made into Reservations sytem by customer Data is then transformed, validated and merged in the Reservations system It is subsequenlty extracted into a flat file to be consumed…
merlynhs
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Alluvial diagram with R (or related)

In a survey I asked two question: What is your main transportation?(only 1 possible answer and mandatory answer) What is your secondary transportation? (0 or many answer, each secondary transport contains 0 for yes and 1 for no) Here are some fake…
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How to draw an ER diagram from a DFD

I am doing my uni assignment and I need to draw an ER diagram out of a DFD which I have already done. What will be the entities in ER, only data stores from DFD or do I need to add something else? Thanks
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