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The Data flow diagram (DFD) example "Payment for goods using UPS code scanner" shows data flow in process of payment for goods in the shop using the MaxiCode scanner.
"MaxiCode is a public domain, machine-readable symbol system originally created and used by United Parcel Service. Suitable for tracking and managing the shipment of packages, it resembles a barcode, but uses dots arranged in a hexagonal grid instead of bars. MaxiCode has been standardised under ISO/ IEC 16023.
A MaxiCode symbol (internally called "Bird's Eye", "Target", "dense code", or "UPS code") appears as a 1 inch square, with a bullseye in the middle, surrounded by a pattern of hexagonal dots. It can store about 93 characters of information, and up to 8 MaxiCode symbols can be chained together to convey more data. The centered symmetrical bullseye is useful in automatic symbol location regardless of orientation, and it allows MaxiCode symbols to be scanned even on a package traveling rapidly." [MaxiCode. Wikipedia]
This example of data flow diagram (Gane & Sarson notation) was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park.
DFD
DFD, process, external entity, data store,
Used Solutions

Block Diagram

The vector stencils libraries: Block Diagrams, Blocks with Perspective, Callouts, Connectors, Raised Blocks from the solution Block Diagrams contain specific block diagram symbols such as arrows, input/output symbols, start/end symbols, processing symbols, conditional symbols, commenting symbols, callouts, connectors, etc. for ConceptDraw DIAGRAM diagramming and vector drawing software. The Block Diagrams solution is contained in a "Diagrams" area of ConceptDraw Solution Park. Use the libraries from the Block Diagrams solution to draw block diagrams for your business documents, presentations and websites in a few minutes.

UML Diagram

The accepted open standard that is used in software engineering and system design, when modeling object-oriented systems and business processes is known as Unified Modeling Language (UML). UML was created for definition, visualization, design and documentation software systems. It isn't a programming language, but on the base of UML model can be generated code. UML uses generic set of graphic notations for creation an abstract model of the system called UML-model. The UML notation lets visually represent requirements, subsystems, structural and behavioral patterns, logical and physical elements, etc. UML defines 13 types of diagrams: Class (Package), Use Case, Sequence, Object, Collaboration, Component, Timing, Interaction Overview, State Machine, Composite Structure, Activity, and Deployment. All these types of UML Diagrams can be fast and easy created with powerful ConceptDraw DIAGRAM software extended with special Rapid UML solution from Software Development area of ConceptDraw Solution Park.

About UML

Use Case Diagram Taxi Service UML. This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the UML Use Case Diagram library of the Rapid UML Solution from the Software Development area of ConceptDraw Solution Park. This sample shows the work of the taxi service and is used by taxi stations, by airports, in the tourism field and delivery service.