entity-relationship diagram - definizione. Che cos'è entity-relationship diagram
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Cosa (chi) è entity-relationship diagram - definizione

GRAPHICAL REPRESENTATION OF THE "FLOW" OF DATA THROUGH AN INFORMATION SYSTEM
External entity; Data Flow Diagram; Dataflow diagram; Data flow model; Physical Data Flow; Logical Data Flow; Data flow diagram
  • Data flow diagram with data storage, data flows, function and interface
  • DeMarco]] notation''

entity-relationship diagram      
Enhanced entityrelationship model         
ENHANCEMENT OF THE ER MODEL THAT DESCRIBES INTER-RELATED THINGS OF INTEREST IN A SPECIFIC DOMAIN OF KNOWLEDGE WITH SUBCLASS / INHERITANCE SUPPORT
Enhanced entity-relationship; Enhanced Entity-Relationship Model; Extended entity–relationship model; Enhanced entity-relationship model; Extended entity-relationship model; EER model
The enhanced entityrelationship (EER) model (or extended entityrelationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entityrelationship (ER) model, used in the design of databases.
Entity-control-boundary         
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  • 88x88px
  • 99x99px
  • 103x103px
SOFTWARE ARCHITECTURAL CONCEPT IN OBJECT-ORIENTED USE-CASE DRIVEN DESIGN WHICH STRUCTURES THE CLASSES ACCORDING TO USE CASE REALIZATION
Entity-boundary-control; Boundary-control-entity; Robustness diagram
The entity-control-boundary (ECB), or entity-boundary-control (EBC), or boundary-control-entity (BCE) is an architectural pattern used in use-case driven object-oriented software design that structures the classes composing a software according to their responsibilities in the use-case realization.

Wikipedia

Data-flow diagram

A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of each entity and the process itself. A data-flow diagram has no control flowthere are no decision rules and no loops. Specific operations based on the data can be represented by a flowchart.

There are several notations for displaying data-flow diagrams. The notation presented above was described in 1979 by Tom DeMarco as part of structured analysis.

For each data flow, at least one of the endpoints (source and / or destination) must exist in a process. The refined representation of a process can be done in another data-flow diagram, which subdivides this process into sub-processes.

The data-flow diagram is a tool that is part of structured analysis and data modeling. When using UML, the activity diagram typically takes over the role of the data-flow diagram. A special form of data-flow plan is a site-oriented data-flow plan.

Data-flow diagrams can be regarded as inverted Petri nets, because places in such networks correspond to the semantics of data memories. Analogously, the semantics of transitions from Petri nets and data flows and functions from data-flow diagrams should be considered equivalent.