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.
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The digital communication is a physical transfer of the data over a point-to-point or point-to-multipoint communication channel. Channels can be copper wires, optical fibres, wireless communication channels, etc. The data are realized as electromagnetic signals (radiowave, microwave, electrical voltage, etc.).
This example was created in ConceptDraw DIAGRAM using the Computer and Networks Area of ConceptDraw Solution Park and shows the Digital Communication Network diagram.
Picture: Digital Communications Network. Computer and Network Examples
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ER diagram is the most popular database design tool which lets create graphical representations of database tables, their columns and also relationships. As for the Mac users, they are very interested in powerful database diagramming tools and ER diagram tool for OS X to design professional looking E-R Diagrams and ERD drawings. ConceptDraw DIAGRAM software on Mac OS X gives the ability to easy draw ERDs.
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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
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UML Component for Bank - This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the UML Component Diagram library of the Rapid UML Solution from the Software Development area of ConceptDraw Solution Park
Picture: UML Component for Bank
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Create business process diagrams (BPMN 2.0.) with ConceptDraw using professional looking templates. ConceptDraw is business process improvement tools.
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UML Sequence Diagram shows object interactions arranged in time sequence, how processes operate with one another and in what order and illustrate the sequence of messages exchanged between the objects and classes involved in the scenario.
Picture: UML Sequence Diagram. Design Elements
A Storage area network (SAN) is a dedicated network that provides access to data storage and operations only on the block level. SAN usually has own network of storage devices/elements and disk arrays that are connected with each other and to a remote data-sharing network. SANs are widely used for enhancing the storage devices (optical jukeboxes, disk arrays, tape libraries) that are accessible for networked servers.
This example was created in ConceptDraw DIAGRAM using the Computer and Networks Area of ConceptDraw Solution Park. It shows the hybrid of Storage area network (SAN) and Network Attached Storage (NAS) technologies.
Picture: Storage area networks (SAN). Computer and Network Examples
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Tool to draw Metro Map styled inforgraphics. London Tube map sample.
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