Comparison can be made according to specific settings defined by the user. The value entered for Comparison tolerance (relative) is a multiplication factor that sets the limit for two values being equal. For example, if this is set to 0, then two values need to be exactly the same for being considered equal. In contrast, setting the relative tolerance to 1, the values are considered equal. By default, the relative comparison tolerance is set to 1E-5. Using this setting, two values are equal if - in a first approximation - the first five digits after the decimal point are equal. The tolerance has no effect when comparing non-numerical values, like "present/ absent".