Entity Relationship Diagram - ERD - Software for Design
Chen ER Diagrams
One of the methods actively used in a real design of database structure is semantic modeling, which is a modeling of the data structure, based on the meaning of these data. Various types of ER diagrams are used as the tool of semantic modeling.
The first version of the entity-relationship model was proposed in 1976 by Peter Chen. In the future, many authors have developed their own versions of these models (Martin notation, IDEF1X notation, Barker notation, etc.). Irrespective from the notation, all versions of Entity-relationship diagrams are based on the same idea - image is always more visual than text description. ER diagrams use a graphical representation of the entity domain, their properties (attributes), and the relationships between entities.
The Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park extends ConceptDraw DIAGRAM ector graphics and diagramming software with the ability to describe a database using the Entity-Relationship (Chen) model. Use it for design your ERDs and verify that ConceptDraw DIAGRAM offers the best ERD diagrams software tools for design element Chen notation.
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Example 1. Entity Relationship Diagram Software
Design Elements — Chen (Windows, Macintosh).
Entity-Relationship Diagram (ERD) solution offers the ERD Chen's Notation library with variety of ERD symbols for Chen notation. Simply drag the predesigned ERD objects from the library, arrange them, type the text and title to get the excellent result – your own ER Diagram in minutes. It’s a fastest way of drawing, and the most important – you don’t need to be the painter for this.
Example 2. Entity-Relationship Diagram Solution in ConceptDraw STORE
You can also use the ready samples or templates offered by Entity-Relationship Diagram (ERD) solution in ConceptDraw STORE as the base for your own diagrams.
Example 3. ER Diagram, Chen Notation
The samples you see on this page were created in ConceptDraw DIAGRAM software in Mac OS X and Windows 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 Entity-Relationship Diagrams 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.
TEN RELATED HOW TO's:
While creating flowcharts and process flow diagrams, you should use special objects to define different statements, so anyone aware of flowcharts can get your scheme right. There is a short and an extended list of basic flowchart symbols and their meaning. Basic flowchart symbols include terminator objects, rectangles for describing steps of a process, diamonds representing appearing conditions and questions and parallelograms to show incoming data.
This diagram gives a general review of the standard symbols that are used when creating flowcharts and process flow diagrams. The practice of using a set of standard flowchart symbols was admitted in order to make flowcharts and other process flow diagrams created by any person properly understandable by other people. The flowchart symbols depict different kinds of actions and phases in a process. The sequence of the actions, and the relationships between them are shown by special lines and arrows. There are a large number of flowchart symbols. Which of them can be used in the particular diagram depends on its type. For instance, some symbols used in data flow diagrams usually are not used in the process flowcharts. Business process system use exactly these flowchart symbols.
Picture: Basic of Flowchart: Meaning and Symbols
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A network diagram represents the set of computers and network devices and the connections among them. This scheme can be developed for any institution or establishment. To illustrate this concept let’s take for example, a hotel network topology diagram or a school network diagram. These diagrams depict access points, servers, workstations, firewalls and another equipment needed to provide a network.
On this masterpiece drawing one will see a simple scheme a of connecting computers together. Such form of connecting can be applied for a hotel, guest house, bungalow, hut or something else. This diagram shows the images of the real LAN components. So, it represents a physical category of a network construction. It looks similar to a star - so this network configuration is named a star topology. The typical feature of this construction is a center point - usually it is hub, or router. The rays of this star means network connections. Computers, peripherals and other network details are placed on the ends of the star rays.
Picture: Hotel Network Topology Diagram
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ConceptDraw DIAGRAM diagramming and vector drawing software enhanced with Network Security Diagrams Solution from the Computer and Networks Area of ConceptDraw Solution Park is the best for effective design professional, colorful and attractive Network Security Diagram of any complexity and degree of detailing.
Picture: Network Security Diagram
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Designing landscapes nowadays doesn’t require any special skills. Therefore, it’s not rocket science how to use landscape design software and create detailed plans and projects. Special Landscape & Garden Solution from the Building Plans area of ConceptDraw Solution Park provides vivid ready-to-use vector objects of trees, bushes, fences, furniture etc.
Picture: How To use Landscape Design Software
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Use the ConceptDraw DIAGRAM software that has vector clipart of numerous cable connectors, examples, and templates for drawing different types of audio and video connection diagrams. Paste icon of the receiver or another device to page and layout sockets and plugs. Further connect plugs with each other, and now you have well-designed connection diagram.
Picture: How to Make Audio and Video Connections
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Every corporate network is unique, though there are guidelines and best practices in developing networks. As it is quite difficult to implement a pure topology within a company, using a hybrid network topology is considered a better solution. As a rule, such network assembles advantages and features of source topologies.
This diagram is an example of the Hybrid network. This type of network topology means a conjunction of other network topologies. Such as star-bus, ring-mesh topologies, etc. It should be obviously diverse networks. The final computer network inherits both advantages and disadvantages of its ingredients. Using the ConceptDraw Computer and Networks solution including vector graphic libraries and templates one can develop professional custom network diagrams of any topology and complexity.
Picture: Hybrid Network Topology
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The vector stencils library Watercraft contains clipart of ships, boats, yachts, submarines for ConceptDraw DIAGRAM diagramming and vector drawing software.
Use it to draw illustrations of vessels and water transport over a sea, ocean, lake, canal, river.
Picture: Watercraft - Design Elements
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The ConceptDraw vector stencils library Cisco Multimedia, Voice, Phone contains equipment symbols for drawing the computer network diagrams.
Picture: Cisco Multimedia, Voice, Phone. Cisco icons, shapes, stencils and symbols
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Developing a software project supposes architecture first. To make it proper, you can use data flow diagram model in your current project.
The data flow diagram represents the Model of small traditional production enterprise that is made using Yourdon and Coad notation. It shows how the data is transfered through a process. According to the notation of Yourdon and Coad a process is represented by circles and data stores are drawn using parallel lines. This DFD was created using the ConceptDraw Data Flow Diagrams solution. Using this solution one can visualize data flow accordingly to the rules of two basic notations used for data flow modeling.
Picture: Data Flow Diagram Model
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Job duties in small companies are usually spread randomly among workers, causing lots of problems and misunderstanding. One of the ways to restore order in business processing is to create a cross-functional flowchart with swim lanes that would represent every step in production system. Another advantage of using swim lanes flowchart is that it represents not only processes, but people responsible for them.
Swim lane diagram is a kind of a process flow diagram. Its special feature is that it joins the features of process flow diagrams with organizational charts. Thus, a swim lane diagram display a participant of the business process in a conjunction with general flow of the business system. A swim lane diagram is looks similar to a swimming pool's lanes. Lanes can be horizontal and vertical. The lanes are pointed out relatively to resource name, which is assigned on implementation of the given part of the business process. ConceptDraw Business Process Mapping solution delivers the ability to design develop swim lanes flowcharts using the vector graphic objects of Swim Lanes library.
Picture: Swim Lane Diagrams
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