Standard Notches

Standard notches are identified by a notch type (string), followed by a variable number of parameters, separated by asterisks (e.g. R50 for a notch specified by a circular arc with radius 50).

In certain notches some parameters are optional and have default values. Suppose a notch with four parameters of which the last two are optional:

NOT<a>*<b>*<c>*<d>

If in such a case the user wants to give the last parameter <d> but stay with the default value for parameter <c>, this parameter must be replaced by a zero, for example:

NOT*<a>*<b>*0*<d>