Schematic
A schematic is a diagram used to illustrate the elements of a system at an abstract level. This typically involves the use of graphic symbols and lines rather than a 'realistic' representation.
A schematic will generally not show details unless they are expressly relevant to what is being conveyed, unless they assist comprehension.
A common example of a schematic is an electrical circuit diagram, which uses symbols in a layout which may not resemble the actual circuit layout but are instead arranged for ease of interpretation. Similarly, a transit map uses graphic symbols to represent stations and the arrangement of the train lines will often not resemble the geographic location of the stations in relation to one another.
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