Prestige classes offer a new form of multiclassing. Unlike the basic classes, characters must meet Requirements before they can take their first level of a prestige class. The rules for level advancement apply to this system, meaning the first step of advancement is always choosing a class. If a character does not meet the Requirements for a prestige class before that first step, that character cannot take the first level of that prestige class. Taking a prestige class does not incur the experience point penalties normally associated with multiclassing.
Here are definitions of some terms used in this section.
One of the standard eleven classes.
Generally equal to the number of class levels (see below) in a spellcasting class. Some prestige classes add caster levels to an existing class.
The total level of the character, which is the sum of all class levels held by that character.
The level of a character in a particular class. For a character with levels in only one class, class level and character level are the same.