This article contains information about built-in titleformatting functions and field references with special meaning. References to documentation about fields and function which can only be used in specific components or which are provided by specific components can be found at the end of this article. A field reference is a field name enclosed in percent signs, for example %artist%. A function call starts with a dollar sign, followed by the function name and the parameter list. A parameter list can either be empty - denoted as () - or contain one or more parameters separated by commata, for example $abbr(%artist%). Note that there must be no whitespace between the dollar sign and the function name, or the function name and the opening parenthesis of the parameter list. Please see Title Formatting Introduction for a presentation of titleformat syntax in general. For details of the query syntax, which uses these fields, see: Query Syntax.