Brown were working with close predecessors of Chen’s approach.
It’s seen more recently in the 19th and 20th Century works of philosopher-logicians like Charles Sanders Peirce and Gottlob Frege.īy the 1960s and 1970s, Charles Bachman (above) and A.P.G. In a broader sense, the depiction of the interconnectedness of things dates back to least ancient Greece, with the works of Aristotle, Socrates and Plato.
While serving as an assistant professor at MIT’s Sloan School of Management, he published a seminal paper in 1976 titled “The Entity-Relationship Model: Toward a Unified View of Data.” Peter Pin-Shan Chen), currently a faculty member at Carnegie-Mellon University in Pittsburgh, is credited with developing ER modeling for database design in the 1970s. Features of Dia include multiple-page printing, export to many formats (EPS, SVG, CGM and PNG), and the ability to use custom shapes created by the user as simple XML descriptions. Dia is useful for drawing UML diagrams, network maps, and flowcharts.ĭia can be used by many people in a variety of industries.Ī systems engineer can create SADT diagrams for system analysis and design.Ī requirements engineer can compose e.g. RE-KAOS, RE-Jackson or RE-I* diagrams.Ī software developer can create UML diagrams of various types and extend them with the flexibility of a general purpose diagram tool.Ī database designer can represent data relations with ER diagrams.Ī control engineer may draw Cybernetics diagrams.Ī computer programmer can create a flow chart to show the execution path of a program.Ī network administrator can create a diagram to model the company's company network.Īn electrical engineer may use Dia to create a diagram to show how a circuit works.Īn mechanical engineer may design some Hydraulic or Pneumatic diagrams.Peter Chen (a.k.a. Its interface and features are loosely patterned after the Windows program Visio. Dia is an application for creating technical diagrams.
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