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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)
"Mobile IPTV is a technology that enables users to transmit and receive multimedia traffic including television signal, video, audio, text and graphic services through IP-based the wired and wireless networks with support for Quality of Service/ QoE, security, mobility, and interactive functions. Through Mobile IPTV, users can enjoy IPTV services anywhere and even while on the move." [Mobile IPTV. Wikipedia]
This mobile web-based TV network diagram example was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Telecommunication Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Mobile IP-based TV diagram
Mobile IP-based TV diagram, wireless router, satellite dish, radio waves, laptop computer, notebook, globe, Internet, fir-tree, tree, cellular phone, mobile phone, building, base station, antenna,
Used Solutions
The vector stencils library "Telecommunication networks" contains 32 clipart images of telecommunication network devices and equipment for drawing telecom network diagrams.
"A telecommunications network is a collection of terminal nodes, links and any intermediate nodes which are connected so as to enable telecommunication between the terminals.
The transmission links connect the nodes together. The nodes use circuit switching, message switching or packet switching to pass the signal through the correct links and nodes to reach the correct destination terminal.
Each terminal in the network usually has a unique address so messages or connections can be routed to the correct recipients. The collection of addresses in the network is called the address space." [Telecommunications network. Wikipedia]
The clip art example "Telecommunication networks - Vector stencils library" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Telecommunication Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Internet
Internet, Internet, cloud,
Globe
Globe, globe, Internet,
Base station
Base station, base station,
Satellite dish
Satellite dish, satellite dish,
Satellite dish
Satellite dish, satellite dish,
Communications satellite
Communications satellite, satellite,
Wireless cell tower
Wireless cell tower,
Radio waves
Radio waves, radio waves,
Radio waves
Radio waves, radio waves,
Cellular phone
Cellular phone, cellular phone, mobile phone,
Server
Server, server,
Laptop computer
Laptop computer, laptop computer, notebook,
Desktop computer
Desktop computer, PC,
Car
Car, car,
Satellite truck
Satellite truck, in-vehicle station,
House
House, house,
House
House, house,
Office building
Office building, office building,
Mountain
Mountain, mountain,
Tree
Tree, tree,
Tree
Tree, fir-tree, tree,
User
User, man, user,
Call-center
Call-center, call-center, call operator, woman,
Multi-storey
Multi-storey, building,
Antenna
Antenna, antenna,
Router
Router, router,
IP phone
IP phone, IP phone,
Fax
Fax, fax,
Network cell
Network cell, network cell, cell, honeycomb,
IP Camera
IP Camera, camera,
Wireless router
Wireless router, wireless router,
Networking device
Networking device, device,
Used Solutions

australia map, map of australia, map australia Australia Map

australia map, map of australia, map australia
For graphic artists creating accurate maps of Australia. The Australia Map solution - allows designers to map Australia for their needs, offers a collection of scalable graphics representing the political geography of Australia, split into distinct state

landscape plan, how to design a garden, modern garden design, how to design landscape, landscape design tools Landscape & Garden

landscape plan, how to design a garden, modern garden design, how to design landscape, landscape design tools
The Landscape and Gardens solution for ConceptDraw DIAGRAM is the ideal drawing tool when creating landscape plans. Any gardener wondering how to design a garden can find the most effective way with Landscape and Gardens solution.
The vector stencils library "Computers and network isometric" contains 56 3D clipart images of computer and network devices and equipment for drawing network diagrams.
The clip art example "Computers and network isometric - Vector stencils library" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Computer and Networks solution from the Computer and Networks area of ConceptDraw Solution Park.
Laptop
Laptop, laptop computer, notebook,
DDCS
DDCS, DDCS, Distributed Data Communications Server,
Server
Server, server,
Webcam
Webcam, Web-camera,
Wireless Network Storage
Wireless Network Storage, wireless network storage,
Personal computer
Personal computer, PC,
VoIP phone
VoIP phone, IP phone,
Fax
Fax, fax,
Plotter
Plotter, plotter,
Mobile phone
Mobile phone, cellular phone, mobile phone,
Feature phone
Feature phone, cellular phone, mobile phone,
Printer
Printer, printer,
Satellite dish
Satellite dish, satellite dish,
Satellite antenna
Satellite antenna, satellite antenna,
Automatic-tracking satellite dish
Automatic-tracking satellite dish, satellite dish,
Wireless access point
Wireless access point, wireless access point,
Wireless router
Wireless router, wireless router,
Router
Router, router,
Network switch
Network switch, switch,
Network device
Network device, device,
Mobile GPS Terminal
Mobile GPS Terminal, mobile GPS terminal,
GPS phone
GPS phone, GPS phone,
Television antenna
Television antenna, antenna,
Radio tower
Radio tower, wireless cell tower,
Base station
Base station , base station ,
Satellite
Satellite, satellite,
In-vehicle satellite telecommunication
In-vehicle satellite telecommunication, in-vehicle station,
Satellite dishes on ship
Satellite dishes on ship , ship,
Airplane
Airplane, airplane,
Internet
Internet, Internet,
Man
Man, man,
Woman
Woman, woman,
Call-center
Call-center, call-center,
Honeycomb
Honeycomb, honeycomb,
Mountain
Mountain, mountain,
Radio waves
Radio waves, radio waves,
Radio waves
Radio waves, radio waves,
Tower block
Tower block, high-rise building,
Office building
Office building, office building,
House
House, house,
House
House, house,
Globe
Globe, globe, Internet,
Wireless security camera
Wireless security camera, camera,
Truck
Truck, truck,
Tree
Tree, tree,
Conifer tree
Conifer tree, fir-tree,
1U hub / switch
1U hub / switch, 1U hub switch,
2U hub / switch
2U hub / switch, 2U hub switch,
1U server
1U server, 1U server,
2U Server
2U Server, 2U server,
3U Server
3U Server, 3U server,
4U Server
4U Server, 4U server,
Communications satellite
Communications satellite, satellite,
Car
Car, car,
Radio waves
Radio waves, radio waves,
Firewall
Firewall, firewall,
Used Solutions

Christmas clipart, New Year invitation template, holiday greeting card Holiday

Christmas clipart, New Year invitation template, holiday greeting card
The Holiday Solution from Illustration area of ConceptDraw Solution Park contains holiday illustration examples, templates and vector clipart library.

winter sports Winter Sports

winter sports
The Winter Sports solution from Sport area of ConceptDraw Solution Park contains winter sports illustration examples, templates and vector clipart libraries.
"A telecommunications network is a collection of terminal nodes, links and any intermediate nodes which are connected so as to enable telecommunication between the terminals. The transmission links connect the nodes together. The nodes use circuit switching, message switching or packet switching to pass the signal through the correct links and nodes to reach the correct destination terminal. Each terminal in the network usually has a unique address so messages or connections can be routed to the correct recipients. The collection of addresses in the network is called the address space. Examples of telecommunications networks are: computer networks, Internet, telephone network, global Telex network, aeronautical ACARS network." [Telecommunications network. Wikipedia]
The example "Design elements - Telecommunication networks" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Telecommunication Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Telecom diagram symbols
Telecom diagram symbols, wireless router, tree, server, satellite dish, satellite, router, radio waves, office building, network cell, cell, honeycomb, mountain, man, user, laptop computer, notebook, in-vehicle station, house, globe, Internet, fir-tree, tree, fax, device, cellular phone, mobile phone, car, camera, call-center, call operator, woman, building, base station, antenna, PC, Internet, cloud, IP phone,
Used Solutions

House Plans, home plans, floor plans, home design, house designs, architects, home building and construction, new home plans, home designer, dream home, blueprints Building Design Package

House Plans, home plans, floor plans, home design, house designs, architects, home building and construction, new home plans, home designer, dream home, blueprints
Architects and building engineers to develop building documentation, floor plans and building blueprints, to help designers depict bright and innovative design solutions, make beautiful design proposals and represent the most daring design ideas, to communicate ideas and concepts that relate to construction and design, explain requirements to a building contractor and builders, record completed work, and make a record of what currently exists.
This diagram sample illustrates the cooperative vehicular delay-tolerant network operation.
"Delay-tolerant networking (DTN) is an approach to computer network architecture that seeks to address the technical issues in heterogeneous networks that may lack continuous network connectivity. Examples of such networks are those operating in mobile or extreme terrestrial environments, or planned networks in space.
Recently, the term disruption-tolerant networking has gained currency in the United States due to support from DARPA, which has funded many DTN projects. Disruption may occur because of the limits of wireless radio range, sparsity of mobile nodes, energy resources, attack, and noise." [Delay-tolerant networking. Wikipedia]
"Routing in delay-tolerant networking concerns itself with the ability to transport, or route, data from a source to a destination, which is a fundamental ability all communication networks must have. Delay- and disruption-tolerant networks (DTNs) are characterized by their lack of connectivity, resulting in a lack of instantaneous end-to-end paths. In these challenging environments, popular ad hoc routing protocols such as AODV and DSR fail to establish routes. This is due to these protocols trying to first establish a complete route and then, after the route has been established, forward the actual data. However, when instantaneous end-to-end paths are difficult or impossible to establish, routing protocols must take to a "store and forward" approach, where data is incrementally moved and stored throughout the network in hopes that it will eventually reach its destination. A common technique used to maximize the probability of a message being successfully transferred is to replicate many copies of the message in hopes that one will succeed in reaching its destination." [Routing in delay-tolerant networking. Wikipedia]
The example "Cooperative vehicular delay-tolerant network diagram" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Vehicular Networking solution from the Computer and Networks area of ConceptDraw Solution Park.
Vehicular network diagram
Vehicular network diagram, truck, tree, taxi, road, radio tower, office building, house, high rise block, fir tree, factory, crossroads, coverage area, car, bungalow, block, airport, airplane,
Used Solutions
"A telecommunications network is a collection of terminal nodes, links and any intermediate nodes which are connected so as to enable telecommunication between the terminals. The transmission links connect the nodes together. The nodes use circuit switching, message switching or packet switching to pass the signal through the correct links and nodes to reach the correct destination terminal. Each terminal in the network usually has a unique address so messages or connections can be routed to the correct recipients. The collection of addresses in the network is called the address space. Examples of telecommunications networks are: computer networks, Internet, telephone network, global Telex network, aeronautical ACARS network." [Telecommunications network. Wikipedia]
The example "Design elements - Telecommunication networks" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Telecommunication Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Telecom diagram symbols
Telecom diagram symbols, wireless router, tree, server, satellite dish, satellite, router, radio waves, office building, network cell, cell, honeycomb, mountain, man, user, laptop computer, notebook, in-vehicle station, house, globe, Internet, fir-tree, tree, fax, device, cellular phone, mobile phone, car, camera, call-center, call operator, woman, building, base station, antenna, PC, Internet, cloud, IP phone,
Used Solutions
This vehicular network diagram sample was drawn on the base of picture illustrating the post "Intelligent transportation system" from the blog "Technology New Here".
"Intelligent transportation systems are projects that aim to integrate modern communication and information technology into existing transportation management systems in order to optimize vehicle life, fuel efficiency, safety, and traffic in urbanized cities.
The need for intelligent transportation systems stems from the fact that traffic congestion has been increasing all around the world because of increasing population, increasing amount of transportation vehicles and increasing urbanization."
[technologynewhere.wordpress.com/ 2010/ 05/ 12/ intelligent-transportation-system/ ]
The vehicular network diagram example "Intelligent transportation system" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Vehicular Networking solution from the Computer and Networks area of ConceptDraw Solution Park.
Vehicular network diagram
Vehicular network diagram, truck, tree, taxi, road, office building, house, high rise block, fir tree, crosswalks, car, bus,
Used Solutions

Australia Map

Maps surround us everywhere in our life, study, work, traveling, they are widely used in geography, history, politics, economics, and many other fields of science and life activity. But designing of maps is usually complex and labor-intensive process. Now we have the possibility to make easier this process - ConceptDraw DIAGRAM diagramming and vector drawing software extended with Australia Map Solution from the Maps Area of ConceptDraw Solution Park will help us in easy drawing detailed Australia map.