ER-model is a data model which lets describe the conceptual schemes in a specific subject area. It can help to highlight the key entities and specify relationships that can be established between these entities. During the database design, it is realized the transformation of ER model into certain database scheme based on the chosen data model (relational, object, network, etc.). There are used two notations for ERDs: Crow's Foot and Chen's.
Crow's Foot notation proposed by Gordon Everest represents the entity by rectangle containing its name (name must be unique within this model), and relation - by the line which links two entities involved in relationship. The relationship's plurality is graphically indicated by a "plug" on the end of the link, the optionality - by a circle. Entity-Relationship Diagrams based on Crow's Foot notation can be easily drawn using the ConceptDraw DIAGRAM. Extended with Entity-Relationship Diagram (ERD) solution, it is the best ERD diagrams software with powerful tools and ready design elements for Crow's Foot and Chen notations.
Structured Systems Analysis and Design Method (abbr. SSADM) is a method developed in Great Britain and accepted in 1993 as a national standard for information systems development and analysis. SSADM is based on Data Flow Diagrams and is characterized with presence of clear sequence of steps at projecting, analysis, and documenting of information system. It involves 6 main stages: analysis of existing system or estimation of practicability, requirements definition, determination of technical requirements and equipment cost, development of logical data model, projecting of logical requirements and specification them, physical projecting. Each of them is also divided into several steps defining the tasks that should be fulfilled at a given stage. The most important SSADM elements are flows modeling with help of DFD, data logic modeling with help of LDS (Logical Data Structure) and description of entities behavior.
Applying of SSADM is easy with ConceptDraw DIAGRAM diagramming and vector drawing software and Data Flow Diagram solution.
Data Flow Diagram (DFD) is a methodology of graphical structural analysis and information systems design, which describes the sources external in respect to the system, recipients of data, logical functions, data flows and data stores that are accessed. DFDs allow to identify relationships between various system's components and are effectively used in business analysis and information systems analysis. They are useful for system’s high-level details modeling, to show how the input data are transformed to output results via the sequence of functional transformations. For description of DFD diagrams are uses two notations — Yourdon and Gane-Sarson, which differ in syntax.
Online Store DFD example illustrates the Data Flow Diagram for online store, the interactions between Customers, Visitors, Sellers, depicts User databases and the flows of Website Information. ConceptDraw DIAGRAM enhanced with Data Flow Diagrams solution lets you to draw clear and simple example of DFD for Online Store using special libraries of predesigned DFD symbols.
Campus Area Network (CAN) is a computer network which provides wireless access to the Internet or LAN for the users located in two or more buildings on the limited geographical area, or in the open space surrounding these buildings. Campus Area Network is usually set in campus of a university or college, but the same kind of planning and design can be applied for other purposes, for enterprises, office buildings, military bases, industrial complexes, public places like supermarkets, entertainment centers, etc. Another form of temporary CAN can exist during some special events such as rallies, music festivals.
The elementary Campus Area Network can also arise spontaneously, due to the distance of spread the radio signals from the access points that are not limited by buildings walls. It is also sensible to have additional access points for the larger and more complex CANs, located at specially places chosen for serving clients. Design easy diagrams and schemes for the Campus Area Networks with Computer Network Diagrams solution for ConceptDraw DIAGRAM.
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 describes the use of the classes, the generalization associations between them, the multiplicity of associations and constraints. Provided UML diagram is one of the examples set that are part of Rapid UML solution.
The network glossary contains a complete list of network, computer-related and technical terms in alphabetic order, explanations and definitions for them, among them there are words well known for you and also specific, rare-used, uncommon or newly introduced terms. This specialized glossary, also known as a vocabulary, is the best in its field and covers in details the various aspects of computer network technologies. This glossary was developed by specialists using the practical experience and many useful sources to help the ConceptDraw users in their work, you can read and learn it from the screen on-line or print, it can be also used as a perfect educational guide or tutorial.
ConceptDraw DIAGRAM software extended with Computer and Networks solution is easy to draw various types of Network diagrams, Network topology diagrams, Computer networking schematics, Network maps, Cisco network topology, Computer network architecture, Wireless networks, Vehicular networks, Rack diagrams, Logical, Physical, Cable networks, etc.
Desktop ConceptDraw DIAGRAM Software is a good Visio for Mac Os X replacement. It gives you rich productivity and quality of the produced diagrams.
This sample shows the Flowchart that displays the layout and work flow of the cloud marketing platform. This diagram has a style of the marketing brochure. This style displays the central product that is related to the other issues.
Using the ready-to-use predesigned objects, samples and templates from the Flowcharts Solution for ConceptDraw DIAGRAM you can create your own professional looking Flowchart Diagrams quick and easy.
ConceptDraw DIAGRAM diagramming and vector drawing software extended with Fishbone Diagrams solution is a perfect tool for software designers and software developers. If you need to create Cause and Effect diagram, Fishbone diagram, Ishikawa diagram from templates and examples, or using the predesigned elements, ConceptDraw DIAGRAM can do this easily.
ConceptDraw DIAGRAM software gives ability to design Fishbone diagrams that identify many possible causes for an effect for problem. Each Fishbone diagram design element included to Fishbone Diagrams library is vector and ready-to-use.
Unified Modeling Language (UML) is an open standard, the language of graphic description used for modeling objects in a field of software development and software engineering. It was created for definition, specification, visualization, designing and documenting software systems, as a unification of three object-oriented technologies Booch, OMT and OOSE, and uses the defined graphic notation for creating the visual models of object-oriented software systems. Description of UML consists of two parts, interactive and supplementing each other: UML semantics, which represents a certain metamodel, defines the abstract syntax and semantics of terms of object modeling with UML, and UML notation that is a graphic notation for visual representation of UML semantics.
The powerful tools of the Rapid UML solution included to ConceptDraw Solution Park make the ConceptDraw DIAGRAM diagramming and vector drawing software the best for easy applying the UML notation when creating the visual models of object-oriented software systems and designing different kinds of UML diagrams.
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