maatstreep
The maatstreep, also known as a bar line, is a vertical line drawn through the staff in musical notation. Its primary function is to divide music into measures or bars. A measure is a segment of time defined by a given number of beats, as indicated by the time signature. The maatstreep clearly delineates the beginning and end of each measure, aiding in the organization and readability of a musical composition.
There are several types of maatstreep. A single maatstreep is the most common, simply separating one measure