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ERD Symbols and Meanings

ERD Symbols and Meanings
Entity Relationship Diagram (ERD) is a popular software engineering tool for database modeling and illustration the logical structure of databases, which uses one of two notations - Chen's or Crow’s Foot. Crow's foot notation is effective when used in software engineering, information engineering, structured systems analysis and design. Each of these notations applies its own set of ERD symbols. Crow's foot diagrams use boxes to represent entities and lines between these boxes to show relationships. Varied shapes at the ends of lines depict the cardinality of a given relationship. Chen's ERD notation is more detailed way to represent entities and relationships. ConceptDraw DIAGRAM application enhanced with all-inclusive Entity-Relationship Diagram (ERD) solution allows design professional ER diagrams with Chen's or Crow’s Foot notation on your choice. It contains the full set of ready-to-use standardized ERD symbols and meanings helpful for quickly drawing, collection of predesigned ERD samples, examples and templates. ConceptDraw Pro is a great alternative to Visio for Mac users as it offers more features and can easily handle the most demanding professional needs.
How to Build an Entity Relationship Diagram (ERD)
How to Build an Entity Relationship Diagram (ERD)

Entity Relationship Diagram Symbols

Entity Relationship Diagram Symbols
The semantic modeling method nowadays is successfully applied in database structure design. It is effective method of modeling the data structures, which is based on the meaning of these data. As a tool of semantic modeling, there are used different types of Entity-Relationship Diagrams. Entity Relationship Diagram (ERD) is applied to visually and clearly represent a structure of a business database. The main components of ERDs are: entity, relation and attributes. An entity is a class of similar objects in the model, each entity is depicted in the form of rectangle and has the name expressed by a noun. Relation is shown in the form of non-directional line that connects two entities. There are several notation styles used for ERDs: information engineering style, Chen style, Bachman style, Martin Style. The Entity Relationship Diagram symbols used for professional ERD drawing are predesigned by professionals and collected in the libraries of the Entity-Relationship Diagram (ERD) solution for ConceptDraw DIAGRAM software.

UML Class Diagram Generalization Example UML Diagrams

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.

Watercraft - Design Elements

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.
The vector stencils library "Local vehicular networking" contains 88 symbols for drawing the vehicular computer telecommunication network diagrams using the ConceptDraw PRO diagramming and vector drawing software.
"A vehicular ad hoc network (VANET) uses cars as mobile nodes in a MANET to create a mobile network.[1] A VANET turns every participating car into a wireless router or node, allowing cars approximately 100 to 300 metres of each other to connect and, in turn, create a network with a wide range. As cars fall out of the signal range and drop out of the network, other cars can join in, connecting vehicles to one another so that a mobile Internet is created. It is estimated that the first systems that will integrate this technology are police and fire vehicles to communicate with each other for safety purposes. ...
Vehicular ad hocal networks are expected to implement wireless technologies such as dedicated short-range communications (DSRC) which is a type of Wi-Fi. Other candidate wireless technologies are cellular, satellite, and WiMAX. Vehicular ad hoc networks can be viewed as component of the intelligent transportation systems (ITS).
As promoted in ITS, vehicles communicate with each other via inter-vehicle communication (IVC) as well as with roadside base stations via roadside-to-vehicle communication (RVC)." [Vehicular ad hoc network. Wikipedia]
The example "Design elements - Local vehicular networking" is included in the Vehicular Networking solution from the Computer and Networks area of ConceptDraw Solution Park.
Vehicular network diagram symbols
Vehicular network diagram symbols, truck, tree, traffic light, taxi, ship, satellite dish, satellite, router, road, river, radio tower, office building, mountain, mote, man, laptop, computer, notebook, lake, in-vehicle station, house, high rise block, fir tree, factory, elevated, crossroads, coverage area, cloud, internet, cell tower, cell phone, car, bungalow, bridge, block, antenna, airport, airplane, PC, IP phone,
Used Solutions

Building Drawing. Design Element: Piping Plan

When you are going to build a house or to make repairs of new built home, apartment, office, shop, or to renovate any other premises, in many cases you will need to make the package of drawings, plans and documents, including the such important plans as the Overall floor plan, Interior design plan, Ceiling plan, Electrical system plan, and of course the Plumbing plan, Water supply system plan, and Piping Plan. When choosing between the modern software for building construction, planning and design, we recommend you to select the multifunctional building plan software ConceptDraw DIAGRAM enhanced with Plumbing and Piping Plans solution from the Building Plans area of ConceptDraw Solution Park. This solution provides large variety of examples, samples, quick-start templates and libraries of pipes, plumbing and valves vector design elements for design and construction the Plumbing and Piping Plans, schematics and annotated diagrams for hot and cold water supply systems, water lines and waste water disposal systems.

Interior Design. Shipping and Receiving — Design Elements

Shipping and Receiving — Design Elements
Create port terminal plans use the appropriate stencils with shipping and receiving design element.
"Crow's Foot notation is used in Barker's Notation, SSADM and Information Engineering. Crow's Foot diagrams represent entities as boxes, and relationships as lines between the boxes. Different shapes at the ends of these lines represent the cardinality of the relationship." [Entity–relationship model. Wikipedia]
The vector stencils library ERD, crow's foot notation contains 18 symbols for creating the ER-diagrams using the ConceptDraw PRO diagramming nd vector drawing software.
The example"Design elements - ERD solution (crow's foot notation)" is included in the Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park.
Crow's foot ERD
Crow's foot ERD, entity,
Used Solutions

Flowchart Components

Flowchart Components
The ConceptDraw Flowchart component includes a set of samples and templates. This geathered as flowchart maker toolbox which focused on drawing flowcharts of any industry standards.

Relationships Analysis

Relationships Analysis. Relations Diagram - factors analysis, factors relations. Create Relations Diagram with ConceptDraw DIAGRAM. The Seven Management and Planning Tools is a tool for Interaction diagram drawing. This diagram identifies causal relationships. Determine what factors are causes and which factors are effects. Interaction diagram helps establish KPIs to monitor changes and the effectiveness of corrective actions in resolving the problem.