This advanced component is a custom <f:converter> tag that registers a converter (by converter
id) on a UIComponent.
In hand authored JSP pages, the standard way to register a
converter on an input or output UIComponent is to embed
an appropriate tag inside the UIComponent tag. Choices
are either a premade tag like <f:convertDateTime>
or <f:convertNumber>, or this generic tag that
lets you specify the converterId of a custom converter
that the user has provided (and registered with a <converter>
element in a faces-config.xml file).
Use this tag only for custom converters. If you want to use
one of the standard converters, open the component's Properties window and set the converter property.