Entity Relationship Diagram Software Engineering
Entity Relationship Diagram (aka ERD, ER Diagram, E-R Diagram) is a well-tried software engineering tool for data modeling, system design and illustrating the logical structure of databases. Introduced by Peter Chen the ER modeling technique is now successfully used in software development, when creating conceptual data model of an information system.
There are used three basic elements for ERDs construction: entities, attributes, relationships. Chen's notation for ERD assumes the use of rectangles to represent entities and diamonds to represent relationships between first-class objects. Another popular notation for ER diagrams is Crow's foot notation.
Professional ERD drawing is an essential software engineering method for database modeling. ConceptDraw DIAGRAM as a powerful Entity Relationship Diagram software engineering offers the tools of Entity-Relationship Diagram (ERD) solution from Software Development area of ConceptDraw Solution Park.
Example 1. Entity Relationship Diagram Software Engineering (Mac OS X, Microsoft Windows)
Use ConceptDraw DIAGRAM enhanced with Entity-Relationship Diagram (ERD) solution to draw Entity Relationship Diagrams using Chen's or crow's foot notations. This solution contains a lot of useful drawing tools, 2 libraries with 45 vector design elements for both notations, and amazing collection of ready ERD samples, examples and templates for quick start.
Example 2. Entity relationship diagram (ERD), Chen's notation
The Entity-Relationship Diagram (ERD) solution for ConceptDraw Solution Park is an effective help in description a database using the Entity-Relationship model. Make sure this right now!
Example 3. Entity Relationship Model Diagram, Crow's Foot notation
The following features make ConceptDraw DIAGRAM the best Entity Relationship Diagram Software:
- You don't need to be an artist to draw professional looking diagrams in a few minutes.
- Large quantity of ready-to-use vector objects makes your drawing diagrams quick and easy.
- Great number of predesigned templates and samples give you the good start for your own diagrams.
- ConceptDraw DIAGRAM provides you the possibility to use the grid, rules and guides. You can easily rotate, group, align, arrange the objects, use different fonts and colors to make your diagram exceptionally looking.
- All ConceptDraw DIAGRAM documents are vector graphic files and are available for reviewing, modifying, and converting to a variety of formats: image, HTML, PDF file, MS
PowerPoint Presentation, Adobe Flash, MS Visio.
- Using ConceptDraw STORE you can navigate through ConceptDraw Solution Park, managing downloads and updates. You can access libraries, templates and
samples directly from the ConceptDraw STORE.
- If you have any questions, our free of charge support is always ready to come to your aid.
TEN RELATED HOW TO's:
Two types of diagrams are used in UML: Structure Diagrams and Behavior Diagrams. Behavior Diagrams represent the processes proceeding in a modeled environment. Structure Diagrams represent the elements that compose the system.
Picture: UML Diagram Types List
Structure of a software product might get very complex and complicated, if software engineers did not pay much attention to the architecture of the product. It will take a few minutes to create UML diagrams with ConceptDraw DIAGRAM , because this software is just perfect for diagramming. You can alter ready-to-use templates, or make your own, whatever you need.
This illustration represent the example of UML diagram made by using ConceptDraw Rapid UML solution. This activity diagram displays the stages of the software development process similar to a flow chart. This diagram depicts the states of elements in the software system. It can be applied to represent software and coding logic. This UML diagram was drawn with the help of the ConceptDraw Rapid UML solution which supplies the kit of vector libraries, containing the symbols of the Unified Modeling Language notations.
Picture: UML Diagrams with ConceptDraw DIAGRAM
Microsoft Azure is widely used cloud platform which was created by Microsoft and now is managed by Microsoft datacenters in 19 regions of the world, and has a wide set of benefits and features.
ConceptDraw DIAGRAM diagramming and vector drawing software extended with Azure Architecture Solution from the Computer and Networks area of ConceptDraw Solution Park is the best for designing various pictorial infographics, illustrations and materials showing the possibilities and work of Microsoft Azure Cloud System and Azure services.
Picture: Microsoft Azure
Any information system receives data flows from external sources. In order to visualize them there is a list of data flow diagram symbols that describes how the system components cooperate. If you want to create a data flow diagram, ConceptDraw DIAGRAM Solution Park has DFD Library that contains both Yourdon and Gane-Sarson notations.
This figure shows the content of vector libraries, delivered with ConceptDraw solution for data flow diagram (DFD). There are three libraries composed from about 50 vector objects used to make data flow diagrams.
They include a complete set of objects utilized by Yourdon-Coad and Gane-Sarson notations - two primary notations that are apply for data flow diagramming. Also, one can discover additional "Data flow diagram (DFD)" library that provides a data flow diagram elements for designing level 1 and context-level data flow diagrams.
Picture: Data Flow Diagram Symbols. DFD Library
UML Apartment Plan. This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the UML Class Diagram library of the Rapid UML Solution from the Software Development area of ConceptDraw Solution Park.
This sample show the detailed plan of the apartment and is used by building companies, design apartments, real estate agencies, at the buying / selling of the realty.
Picture: UML Class Diagram Example - Apartment Plan
In software engineering, a UML Class Diagrams is a type of static structure diagram that is used both for general conceptual modeling of the systematics of the application, and for detailed modeling translating the models into programming code.
Use ConceptDraw DIAGRAM with UML class diagram templates, samples and stencil library from Rapid UML solution to show the classes of system, their attributes, operations or methods, and the relationships among the classes.
Picture: UML Class Diagrams. ConceptDraw DIAGRAM - Diagramming Software for Design UML Diagrams
Unified Modeling Language (UML) is a visual modeling language in the field of software engineering. It is an open standard that provides the graphic notations for creating the visual models of object-oriented software systems. UML took in the notations of the Object-modeling technique, Object-oriented software engineering and the Booch method.
Picture: UML for Software Engineers
UML Class Diagrams describes the structure of a system by showing the system's classes, their attributes, and the relationships among the classes.
Picture: UML Class Diagram. Design Elements
This template shows the Venn Diagram. It was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the ready-to-use objects from the Business Diagrams Solution from the Management area of ConceptDraw Solution Park.
Venn Diagrams visualize all possible logical intersections between several sets and are widely used in mathematics, logic, statistics, marketing, sociology, etc.
Picture: 3 Circle Venn Diagram. Venn Diagram Example