Example 1. Components of ER Diagram, Crow's Foot and Chen's notations
The Chen's ERD notation is still used and is considered to present a more detailed way of representing entities and relationships.
Most other notation systems are adaptations, or use part of these original styles. Here is a brief list of some of other standards that have been developed:
- Bachman notation
- Barker’s notation (ERDs for Oracle)
- EXPRESS and EXPRESS-G notation
- IDEFX1
- UML class diagrams
- Merise
- Object role modeling
- (Min – Max) notation
Example 2. ER Diagram, Chen's notation
ERDs are an invaluable tool for software engineers, particularly since computing capacity, and thus data storage capacity, has markedly increased in recent years. They allow every aspect of database design to be managed, tested and communicated before implementation. Because ERDs have such a broad scope of influence across database activities, it’s imperative the standardized notation can be utilized and interpreted by a wide variety of stakeholders.
Example 3. ER Diagram, Crow's Foot
The Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park extends ConceptDraw DIAGRAM ector graphics and diagramming software with the ability to draw your own entity relationship diagrams using Chen's or Crow's Foot notations applying 2 libraries with numerous predesigned ER icons:
- ERD, Chen's Notation library
- ERD, Crow's Foot Notation library
Example 4. ERD Solution
The samples you see on this page were created in ConceptDraw DIAGRAM using the components of ER diagram from the libraries of Entity-Relationship Diagram (ERD) Solution. An experienced user spent 10-15 minutes creating each of these samples.
Use the Entity-Relationship Diagram (ERD) Solution for ConceptDraw DIAGRAM to create your own Entity-Relationship Diagrams of any complexity quick, easy and effective.
The Entity-Relationship Diagrams designed with ConceptDraw DIAGRAM are vector graphic documents and are available for reviewing, modifying, converting to a variety of formats (image, HTML, PDF file, MS PowerPoint Presentation, Adobe Flash or MS Visio), printing and send via e-mail in one moment.
TEN RELATED HOW TO's:
This template shows the Context Diagram. It was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Block Diagrams Solution from the “Diagrams” area of ConceptDraw Solution Park.
The context diagram graphically identifies the system. external factors, and relations between them. It’s a high level view of the system. The context diagrams are widely used in software engineering and systems engineering for designing the systems that process the information.
Picture: Context Diagram Template
Related Solution:
State Diagram UML of Online Store. 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 shows the work of the medical shop and is used at the creation of the medical shop or pharmacy project, for understanding the process of shopping in the medical shop, for keeping purchases, for medical supplies.
Picture: UML Class Diagram Example - Medical Shop
Related Solution:
Four lessons explaining how to manage your task list in a Gantt chart. You will learn how to adjust your Gantt chart view, how to add/delete tasks or subtasks, how to change tasks hierarchy, how to show/hide subtasks.
Picture: Managing the task list
Describing a workflow or approval process can take hours and be too complicated, especially since there are options to do it quickly and vividly. Diagrams called flowcharts replace long paragraphs of boring text and represent information in a graphic way. You can draw one on paper or you can use flowchart software to do it quickly and scalable. This kind of software is easy to use and you don’t need any special skills to start using it. In addition, there are a lot examples and predesigned templates on the Internet.
Flowcharts are a best tool for staking out a huge and complex process into some small readable parts. Surely, flowcharts can be drawn manually but the use of standard symbols that make it clear for a wide audience makes a software tool preferred for this task. The core for a successful flowchart is its simplicity. That is why often before beginning making flowchart through software, people draw the sketch on a piece of paper. Designing an effective flowchart means the combination of the data needed to be shown and the simplicity with which you depict it.
Picture: Flowchart Software: A Comprehensive Guide
Related Solution:
The UML diagram is a powerful tool which lets visually represent all system's components, the interactions between them and relationships with external user interface.
The Rapid UML solution for ConceptDraw DIAGRAM software offers diversity of UML flowchart symbols for drawing all types of UML diagrams.
Picture: UML Flowchart Symbols
Related Solution:
This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Business Process Diagram Solution from the Business Processes area of ConceptDraw Solution Park. The Business Process Solution is based on the standard BPMN 2.0 and includes the set of libraries of ready-to-use objects.
Picture: BPR Diagram. Business Process Reengineering Example
Related Solution:
ConceptDraw DIAGRAM diagramming and vector drawing software extended with Flowcharts Solution from the 'Diagrams' area of ConceptDraw Solution Park is a powerful tool for drawing Flow Charts of any complexity you need. Irrespective of whether you want to draw a Simple Flow Chart or large complex Flow Diagram, you estimate to do it without efforts thanks to the extensive drawing tools of Flowcharts solution, there are professional flowchart symbols and basic flowchart symbols. This sample shows the Gravitational Search Algorithm (GSA) that is the optimization algorithm.
Picture: Simple Flow Chart
Related Solution:
When we think about programming, we usually imagine sleepless nights spent on writing kilobytes of code. However, from another point of view, Software development with ConceptDraw DIAGRAM makes a programmer's life endlessly easier. This tool is unique to fulfill all your needs in short period of time.
Over the recent years object-oriented methodology has become more and more widespread. Thanks to this methodology developers manage to deal with growing complexity of applications. More and more programs are written in such programming languages as C++, Java, Visual Basic and Object Pascal. However, the complexity of the designed systems imposes extended requirements as to design of graphic documentation. ConceptDraw possesses powerful tools for designing of technical documentation for object-oriented projects. The libraries included in the package allow to easily draw class hierarchies, object hierarchies and diagrams of data flows with the use of the most popular notations, including UML and Booch notations. And the library for projecting COM-interfaces will spare developers of ActiveX-servers a headache.
Picture: Software development with ConceptDraw DIAGRAM
Using diagrams, you can visualize the flow of the information or build a detailed data structure. There's no need to have a degree in software and database design with ConceptDraw DIAGRAM , because this software has all the tools needed in developing models and diagrams. Project planning, designing and prototyping was never so easy.
This UML diagrams can be used to visualize a model of the data base development process. A UML diagram shows a graphical view of a structure of software system: components and relationships.
Using Unified Modeling Language helps to depict logical and physical elements of a data base, visually represent requirements and sub-systems. UML diagrams allows developers to organize and predict critical issues, as well as collaborate data base information.
Picture: Software and Database Design with ConceptDraw DIAGRAM
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IT world is extremely rational and logical. So what can be more precise than Software Diagrams to rate the results of work? Visual statistics is the best way to understand the data.
This figure demonstrates the data flow diagram (DFD), which was created to describe the electronic system of custom purchase. This is the process of buying using electronic bar code scanning system. Such systems are used in large stores. The cashier scans the bar code, the system outputs the data on the price of the goods and carries out a purchase process. This DFD utilizes the Gane/Sarson notation. To create it The ConceptDraw DFD solution has been applied.
Picture: Software Diagrams
