10.3.1.2 Arguments

An argument is a simple value, i.e. any of the following:

• Numeric value (integer or floating point)
• Boolean value: true or false.
• Quoted string.
• A dot (‘.’) This represents the cursor value.
• Attribute: ‘.attr’ This is the value of the attribute attr in the current value (dot). Attribute references can be nested, as in ‘.Attr.Xattr.Yattr’.
• A variable reference: ‘$var’. Here, var is the name of the variable defined in the range action. See Variables, below.
• Function call in parentheses, for grouping.