XSL companion, The

Data types and functions

The expression language handles boolean values, numeric values, strings and nodes. A number of functions are supplied to transform data items from one type to another, and to compare, manipulate and analyze them.

Functions

Functions perform a specific operation and return a value. A return value effectively replaces the function at its position within the expression. Functions have names that represent their purpose, such as 'round' and 'string-length', followed by brackets:

						function()
					

In most cases, functions operate on supplied information, passed to the function as comma-separated parameters placed within the brackets:

						function(parameter1, parameter2)
					

There are a number of functions available to support each of ...