13.6 Notation used to describe SurpriseServer languageThe SurpriseServer language is described using the following notation:

{string}

string enclosed in quotation marks (")

{number}

number written in decimal form

{XYZ}

language token named XYZ

[ XYZ ]

XYZ is not obligatory here

XYZ ...

language element XYZ can be repeated

ABC | XYZ

either ABC or XYZ