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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)

Organic Chemistry Symbols

ConceptDraw DIAGRAM diagramming and vector drawing software extended with Chemistry solution from the Science and Education area of ConceptDraw Solution Park is effective for drawing various organic chemistry schemes, diagrams, illustrations thanks to the included collection of predesigned organic chemistry symbols.

Chemistry Symbols and Meanings

Chemistry solution offers 5 libraries with large collection of vector chemistry symbols and meanings, chemistry equation symbols, organic chemistry symbols, and chemical clipart: Chemical Elements Library, Chemical Drawings Library, Conformations Library, Laboratory Equipment Library, Periodic Table of Chemical Elements Library.

Yourdon and Coad Diagram

The vector stencils library Yourdon and Coad Notation from the solution OOAD contains specific symbols of the Yourdon and Coad notation such as data store symbol, data process symbol, loop symbol for ConceptDraw DIAGRAM diagramming and vector drawing software. The OOAD solution is contained in the Software Development area of ConceptDraw Solution Park.
The vector stencils library "Chemical elements" contains 118 icon symbols of chemical elements for drawing atoms, structural formulas and ball-and-stick models of inorganic and organic molecules and ions, and schemes of chemical reaction mechanisms.
"In chemistry, the ball-and-stick model is a molecular model of a chemical substance which is to display both the three-dimensional position of the atoms and the bonds between them. The atoms are typically represented by spheres, connected by rods which represent the bonds. Double and triple bonds are usually represented by two or three curved rods, respectively. In a good model, the angles between the rods should be the same as the angles between the bonds, and the distances between the centers of the spheres should be proportional to the distances between the corresponding atomic nuclei. The chemical element of each atom is often indicated by the sphere's color." [Ball-and-stick model. Wikipedia]
The chemical symbols example "Design elements - Chemical elements" was created using the ConceptDraw PRO software extended with the Chemistry solution from the Science and Education area of ConceptDraw Solution Park.
Chemical element icons
Chemical element icons, zirconium, Zr, zinc, Zn, yttrium, Y, ytterbium, Yb, xenon, Xe, vanadium, V, uranium, U, ununtrium, Uut, ununseptium, Uus, ununquadium, Uuq, ununpentium, Uup, ununoctium, Uuo, ununhexium, Uuh, ununbium, Uub, tungsten, W, titanium, Ti, tin, Sn, thulium, Tm, thorium, Th, thallium, Tl, terbium, Tb, tellurium, Te, technetium, Tc, tantalum, Ta, sulfur, S, strontium, Sr, sodium, Na, silver, Ag, silicon, Si, selenium, Se, seaborgium, Sg, scandium, Sc, samarium, Sm, rutherfordium, Rf, ruthenium, Ru, rubidium, Rb, roentgenium, Rg, rhodium, Rh, rhenium, Re, radon, Rn, radium, Ra, protactinium, Pa, promethium, Pm, praseodymium, Pr, potassium, K, polonium, Po, plutonium, Pu, platinum, Pt, phosphorus, P, palladium, Pd, oxygen, O, osmium, Os, nobelium, No, nitrogen, N, niobium, Nb, nickel, Ni, neptunium, Np, neon, Ne, neodymium, Nd, molybdenum, Mo, mercury, Hg, mendelenium, Md, meitnerium, Mt, manganese, Mn, magnesium, Mg, lutetium, Lu, lithium, Li, lead, Pb, lawrencium, Lr, lanthanum, La, krypton, Kr, iron, Fe, iridium, Ir, iodine, I, indium, In, hydrogen, holmium, Ho, helium, He, hassium, Hs, hafnium, Hf, gold, Au, germanium, Ge, gallium, Ga, gadolinium, Gd, francium, Fr, fluorine, F, fermium, Fm, europium, Eu, erbium, Er, einsteinium, Es, dysprosium, Dy, dubnium, Db, darmstadtium, Ds, curium, Cm, copper, Cu, cobalt, Co, chromium, Cr, chlorine, Cl, cerium, Ce, carbon, C, californium, Cf, calcium, Ca, caesium, Cs, cadmium, Cd, bromine, Br, boron, B, bohrium, Bh, bismuth, Bi, berylium, Be, berkelium, Bk, barium, Ba, astatine, At, arsenic, As, argon, Ar, antimony, Sb, americium, Am, aluminium,Al, actinium, Ac,
Used Solutions
The vector stencils library "Video and audio" contains 50 symbols of devices and equipment.
Use it for drawing audio and video system layouts, cabling floor plans, electrical circuit schematic and wiring diagrams in the ConceptDraw PRO diagramming and vector drawing software.
The vector stencils library "Video and audio" is included in the Electric and Telecom Plans solution from the Building Plans area of ConceptDraw Solution Park.
Audio amplifier
Audio amplifier, audio amplifier,
RF amplifier
RF amplifier, RF amplifier,
Video amplifier
Video amplifier, video amplifier,
Generic automatic switcher
Generic automatic switcher, generic automatic switcher,
Generic A/V switcher
Generic A/V switcher, audio, video, switcher,
Generic source component
Generic source component, source component,
System components
System components, system component,
Headphone jack
Headphone jack, headphone jack,
Infrared receiver
Infrared receiver, infrared receiver,
Infrared transmitter
Infrared transmitter, infrared transmitter,
Music keypad
Music keypad, music keypad,
Mono speaker outlet
Mono speaker outlet, mono, speaker outlet,
Stereo speaker outlet
Stereo speaker outlet, stereo, speaker outlet,
Speaker ceiling
Speaker ceiling, speaker ceiling,
Speaker in-wall
Speaker in-wall, speaker, in-wall,
Speaker subwoofer
Speaker subwoofer, speaker subwoofer,
Speaker weatherproof
Speaker weatherproof, speaker, weatherproof,
Buzzer and bleeper
Buzzer and bleeper, buzzer, bleeper,
Piezo transducer
Piezo transducer, piezo transducer,
Microphone
Microphone, microphone,
Earphone
Earphone, earphone,
Cable antenna outlet
Cable antenna outlet, cable antenna outlet,
Master antenna outlet
Master antenna outlet, master antenna outlet,
Volume control
Volume control, volume control,
Volume control
Volume control, volume control,
Flush mounted intercom unit
Flush mounted intercom unit, flush mounted, intercom unit,
Master intercom and directory unit
Master intercom and directory unit, master intercom, directory unit,
Floor mounted microphone outlet
Floor mounted microphone outlet, floor mounted, microphone outlet,
Wall mounted microphone outlet
Wall mounted microphone outlet, wall mounted, microphone outlet,
Ceiling mounted speaker
Ceiling mounted speaker, ceiling mounted, speaker,
Speaker horn
Speaker horn, speaker horn,
Wall mounted speaker
Wall mounted speaker, wall mounted, speaker,
Call in switch
Call in switch, call in switch,
Ceiling mounted paging speaker
Ceiling mounted paging speaker, ceiling mounted, paging speaker,
Wall mounted paging speaker
Wall mounted paging speaker, wall mounted, paging speaker,
Flush mounted data floor outlet
Flush mounted data floor outlet, flush mounted, data floor outlet,
Flush mounted data floor outlet
Flush mounted data floor outlet, flush mounted, data floor outlet,
Flush mounted data / telephone floor outlet
Flush mounted data / telephone floor outlet, flush mounted, data, telephone, floor outlet,
Surface mounted data floor outlet
Surface mounted data floor outlet, surface mounted, data floor outlet,
Surface mounted data floor outlet
Surface mounted data floor outlet, surface mounted, data floor outlet,
Surface mounted data / telephone floor outlet
Surface mounted data / telephone floor outlet, surface mounted, data, telephone, floor outlet,
Data outlet
Data outlet, data outlet,
Telephone outlet
Telephone outlet, telephone outlet,
Telephone, data outlet
Telephone, data outlet, telephone, data, outlet,
Wall mounted telephone outlet
Wall mounted telephone outlet, wall mounted, telephone outlet,
Equipment cabinet
Equipment cabinet, equipment cabinet,
Free standing equipment rack
Free standing equipment rack, free standing, equipment rack,
Plywood backboard
Plywood backboard, plywood backboard,
Terminal cabinet with plywood backing
Terminal cabinet with plywood backing, terminal cabinet, plywood backing,
Wall mounted equipment rack
Wall mounted equipment rack, wall mounted, equipment rack,
Used Solutions