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What is meant by an context-free-diagram?

context-free-diagramis a diagram that represents the actors outside a system that could interact with that system.


What is block diagram of scada system for plc?

supervisory control and data acquisition


What is the relationship between a context diagram and diagram 0?

A context diagram shows the system as a single process with interactions between it and external entities, while a diagram 0 (also called a level 0 data flow diagram) expands on the context diagram by breaking down the system into more detailed processes and data flows within the system itself. The context diagram provides an overview, while the diagram 0 provides a more detailed look at how the system functions internally.


Why does a context diagram not show data stores?

A context diagram focuses on showing interactions between a system and external entities, such as users or other systems, without detailing the internal workings. Data stores are considered internal to the system, so they are not shown in a context diagram to keep the diagram simple and to maintain a high-level view of the system's boundaries and connections.


What does the context-level data flow diagram?

the system entities and how they are related


What is a context level diagram?

context diagram shows the system under construction as a single high-level process and then shows the relationship that the system has with other external entities (system, organizational groups, external data stores, etc.)


What is context diagram of enrollment system?

A context diagram of an enrollment system typically shows the system as a central entity, surrounded by external entities such as students, administrators, courses, and possibly databases. It illustrates the interactions between the system and its external entities, without detailing the internal workings of the system.


The difference between context diagram and level 0 diagram?

they are not different they are similar as level 0 DFD represents the primary individual process in system at highest level it is also called context diagram. It describes the overall system at highest level describing which element is inside and which element is outside the system..... youngheart_riwaj@yahoo.com


In Data acquisition system what is mean by acquisition?

'to get'


What symbol is not used in a context diagram?

In a context diagram, specific symbols like the data flow arrows, external entities (represented as rectangles), and the system boundary (often a circle or rectangle) are commonly used. However, symbols such as database icons or detailed process symbols are not included, as a context diagram focuses on high-level interactions rather than internal system details.


What is the role of context diagram in requirement analysis?

Context Diagram is higher level of abstraction of the whole system. It depicts the various subsystems that interact with each other along with major actors involved. It also gives you what information flows between the modules, actors and system at a high level.


What type of Images of context diagram for railway reservation system?

first select train and time of train ,reaching area