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Components of ER Diagram

Components of ER Diagram

Entity-Relationship model gives the possibility to visually describe a database using the components of ER Diagram, entity relationship stencils, relationship symbols, work flow shapes. ER-diagram lets represent the data or entities, attributes of these entities and relationships between them, using standardized Crow’s Foot notation icons or Chen’s notation icons. An entity is an object of the real world, it can exist independently and has the instances which differ in attribute values (properties). The attributes give an unambiguous (uniquely) identification for the instance and are called the primary key, this key can be composite and combine several attributes. ConceptDraw PRO is a professional software available with Entity-Relationship Diagram (ERD) solution from Software Development area that lets create ERDs for various database systems, using Crow’s Foot and Chen’s notations. It is invaluable tool for software engineers and developers, it supports ODBC-compatible databases (Oracle, MySQL, MS Access, MS SQL, InterBase, Firebird and others). Read more

Software Diagrams

Modern software development begins with designing different software diagrams and also uses a large amount of diagrams in project management and creation graphic documentation. Very popular diagrams that depict a work of applications in various cuts and notations, describe databases and prototype Graphical User Interfaces (GUIs). Software engineering specialists and software designers prefer to use special technical and business graphics tools and applications for easy creation diagrams. One of the most popular is ConceptDraw PRO diagramming and vector drawing software. ConceptDraw PRO offers the possibility of drawing with use of wide range of pre-drawn shapes and smart connectors, which allow to focus not on the process of drawing, but on the task's essence. It is a perfect application for design and document development, planning tasks, visualization of data, design the databases, object-oriented design, creation flowcharts of algorithms, modeling business processes, project management, automation of management and development processes, and for many other tasks. Read more

ConceptDraw PRO ER Diagram Tool

Entity-relationship model, also called ER-model, is the main tool of domain modeling on the stage of conceptual design. The modeling of domain data structures is based on the use of graphical tools - Entity-Relationship diagrams (ER-diagrams). The core concepts of ER-Diagram are entity, attribute and relationship. ER-diagram lets visually represent the entities, helps effectively document all properties of designed system and to detail the data storages. To represent the elements at ER-model are commonly used Chen’s notation and Crow’s foot notation, each has its pros and cons. The entity on ER-diagram is represented in the form of rectangle, which specifies its name. An attribute is a property of the entity and relationship is an interaction between the entities. The relationship between two entities is called binary, between more than two entities - ternary. Specific software, such as ConceptDraw PRO with Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park is helpful for easy creation Entity-Relationship Diagrams. Read more

Entity Relationship Diagram Software for Mac

Great part of modern approaches to the database design are based on the use of different versions of ER-models. The important feature of entity-relationship model is that it can be visually represented as a graphical diagram. ER-models and Entity Relationship Diagrams are so popular due to the simplicity and the presentation clarity. The conceptual basis led to their widespread use in CASE-systems, which support automatic design of relational databases. The typical concepts for ER-models are entity, relation and attribute. Relation is a graphically represented association between two entities, that establishes certain rules and all instances of the linked entity types are subject to these rules. In common ER-model this association is always binary. For representing entity-relationship elements, there are used Crow’s foot and Chen notations. ConceptDraw PRO is a famous Entity Relationship Diagram software for Mac OSX which gives the ability to describe visually the databases with Chen’s and Crow’s Foot notation icons from Entity-Relationship Diagram (ERD) solution. Read more

Design Element: Crows Foot for Entity Relationship Diagram - ERD

Entity-Relationship Diagram (ERD) is ideal tool that helps execute the detalization of data warehouse for a given designed system, lets to document the system's entities, attributes (objects' properties), and their interactions each other (relationships). Creation of an ERD requires the choice of specific set of notations, which the best suits for your database design. Two notations - Chen’s and Crow's Foot are applied for ERDs design. Chen's notation was developed first and has linguistic approach, the boxes represent the entities and are considered as nouns, relationships between them are shown as diamonds in a verb form. Over time Chen’s style was adapted into the popular standard - Crow’s Foot notation, where entities are shown as boxes and relationships - as labeled lines. ConceptDraw PRO software supplied with Entity-Relationship Diagram (ERD) solution offers samples and templates of ER diagrams, and also ready-to-use vector design elements - ERD Crow′s Foot and Chen's notation icons for easy designing your own ER diagrams for depicting databases. Read more

How To Draw an iPhone?

How To Draw an iPhone? It's very fast and easy to draw an iPhone and design iPhone user interface using the tools of ConceptDraw PRO extended with iPhone User Interface Solution. iPhone User Interface Solution offers you the incredibly large quantity of predesigned objects that are grouped to 9 libraries: Apps Icons, Bars, Content Views, Controls, iMessage, iPhone 6 Mockup, Tab Bar Icons, Temporary Views, Toolbar and Navigation Bar Buttons. Read more

Software development with ConceptDraw PRO

Modern software development requires creation of large amount of graphic documentation, these are the diagrams describing the work of applications in various notations and cuts, also GUI design and documentation on project management. ConceptDraw PRO technical and business graphics application possesses powerful tools for software development and designing technical documentation for object-oriented projects. Solutions included to the Software Development area of ConceptDraw Solution Park provide the specialists with possibility easily and quickly create graphic documentation. They deliver effective help in drawing thanks to the included package of templates, samples, examples, and libraries with numerous ready-to-use vector objects that allow easily design class hierarchies, object hierarchies, visual object-oriented designs, flowcharts, GUI designs, database designs, visualize the data with use of the most popular notations, including the UML and Booch notations, easy manage the development projects, automate projection and development. Read more

ATM Solutions

In the modern world the ATM Solutions are necessity for various software specialists, designers and developers in banking industry. ConceptDraw PRO diagramming and vector drawing software offers the unique ATM UML Diagrams Solution from the Software Development Area of ConceptDraw Solution Park. Read more

interactive voice response system, IVR Interactive Voice Response Diagrams

Interactive Voice Response Diagrams solution extends ConceptDraw PRO v10 with samples, templates and library of ready-to-use vector stencils to help create Interactive Voice Response (IVR) diagrams illustrating a work of interactive voice response system, Voice-over-Internet Protocol (VoIP) diagrams and Action VoIP diagrams with representing voice actors on them. Read more
interactive voice response system, IVR

wireless communications, WLAN, wireless solution, wireless networking Wireless Networks

The Wireless Networks Solution extends ConceptDraw PRO v10 software with professional diagramming tools to help network engineers and designers efficiently design and create wireless network diagrams that illustrate wireless networks of any speed and complexity. Read more
wireless communications, WLAN, wireless solution, wireless networking