Design Element: Chen
for Entity Relationship Diagram - ERD
Entity-relationship diagrams (ERDs) are intended for the development of data models and provide a standard method for determining data and relationships between them. The first notation for ERD was introduced by Chen and has been further developed by Barker.
Chen notation provides a rich set of data modeling tools, including essentially the ERD, as well as the attribute diagrams and decomposition charts. These diagram techniques are used primarily for designing relational databases.
The entity is a set of instances of real or abstract objects (people, events, conditions, ideas, items, etc.) that have common attributes or characteristics. Any system object can be represented by only one entity, that must to be uniquely identified. In this case the entity name must reflect the type or class of the object, not a specific instance. The relationship in the most general form represents a link between two or more entities.
In other words, the entities are the basic types of information stored in the database, and the relationships show how these types of data are interrelated with each other.
Entity-Relationship Diagram (ERD) solution from Software Development area of ConceptDraw Solution Park provides the libraries with predesigned set of ERD diagram design element Chen corresponding entities and relationships.
Example 1. Design Elements — Chen's (Mac OS X, Windows) for Entity Relationship Diagrams
As well as two libraries of vector stencils with entity relationship symbols, the Entity-Relationship Diagram (ERD) solution provides entity relationship diagram samples, examples, and templates. All they you can find at ConceptDraw STORE and use as the base for your own ER Diagrams.
Example 2. Entity-Relationship Diagrams - Chen Notation
The samples you see on this page were created in ConceptDraw DIAGRAM software using the Entity-Relationship Diagram (ERD) solution and show the ER Diagrams created with Chen notation. An experienced user spent 10 minutes creating these samples.
Use the Entity-Relationship Diagram (ERD) Solution for ConceptDraw DIAGRAM to create quick and easy your own ERDs using the Chen and Crow's Foot notations.
All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The Entity-Relationship Diagram (ERD) Solution is available for all ConceptDraw DIAGRAM or later users.
NINE RELATED HOW TO's:
How to Draw ER Diagrams? With Entity-Relationship Diagram (ERD) solution from the Software Development Area for ConceptDraw Solution Park you are able to draw ER diagram with no problem. It includes 45 predesigned icons advocated by popular Chen's and Crow’s Foot notations that can be used when describing an enterprise database.
Picture: How to Draw ER Diagrams
Diagrams are a very important part of modern life. With the help of flow diagram software, a lot of companies can promote their ideas at the market. Its usefulness is totally doubtless.
This is a flow chart of the invoice payment flow. This flowchart details decrypts all stages of the process of obtaining and paying bills. It is a description of the universal process - such steps performs accounting departments of almost any organization. Since every business no matter what it does is a consumer of some goods or services. The given flow chart was made using ConceptDraw DIAGRAM software and the Diagrams solution for making flowcharts of any kind.
Picture: Flow Diagram Software
The vector stencils library Crow's Foot Notation from the solution Entity-Relationship Diagrams (ERD) contains specific symbols of the Crow's foot notation such as relationship symbols and entity symbols for ConceptDraw DIAGRAM diagramming and vector drawing software. The Entity-Relationship Diagrams (ERD) solution is contained in the Software Development area of ConceptDraw Solution Park.
Picture: Martin ERD Diagram
UML Diagrams Social Networking Sites Project. This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the UML Use Case Diagram library of the Rapid UML Solution from the Software Development area of ConceptDraw Solution Park.
This sample shows the Facebook Socio-health system and is used at the projection and creating of the social networking sites.
Picture: UML Use Case Diagram Example. Social Networking Sites Project
When you need to visually represent the structure of relational database, Entity relationship diagram (ERD) is a type of diagram for that case.
Most entity-relationship diagrams can be built with objects from Flowchart solution or ERD Solution which contains inbuilt templates. Follow these steps to create your own custom ERD diagram.
Don't be frightened if it looks complex, ConceptDraw DIAGRAM makes it easy to create an ERD, and hundreds of other diagrams, in minutes.
Picture: Developing Entity Relationship Diagrams
A Data Flow Diagram (DFD) is a graphical technique which allows effectively model and analyze the information processes and systems. The ability to fast and easy create the DFDs is made possible with Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park. For designing the Data Flow Diagrams are used simple DFD flowchart symbols which are connected each other by arrows depicting the data flow from one step to another.
Picture: DFD Flowchart Symbols
SIPOC is a tool that summarizes the inputs and outputs of one or more processes in table form.
You need to draw professional looking SIPOC Diagram quick and easy? Pay please your attention on ConceptDraw DIAGRAM diagramming and vector drawing software. Extended with Business Process Mapping Solution from the Business Processes Area of ConceptDraw Solution Park, it suits ideal for this.
Picture: SIPOC Diagram
When it comes to system construction, a class diagram is the most widely used diagram. UML Class Diagrams is a type of static structure diagram that is used for general conceptual modeling of the systematics of the application. Such a diagram would illustrate the object-oriented view of a system. The object orientation of a system is indicated by a class diagram. It describes the structure of a system by showing the general issues,classes of a system, attributes, operations, interfaces, inheritance, and the relationships between them.
Picture: UML Class Diagram Notation
The activity of any organization is more or less branchy network of processes. The description of these processes is a hard technical task which requires definite methodology and standards.
According to the IDEF0 standard any process can be described in the form of a block (Activity Box) which has inputs and outputs. The process consists in transformation of inputs into outputs under the influence of the management and in the presence of necessary resources. Outputs of the given process later on can be either inputs for the next process or resources, or management means.
Picture: IDEF0 standard with ConceptDraw DIAGRAM