ebbb0c24_ay_tag_library___Configuration__Description
[Property] factory.decorator [Default] org.displaytag.decorator.DefaultDecoratorFactory [Valid Values] DecoratorFactory to be used. Class name for a valid DecoratorFactory implementation [allowed in properties] no [Description] 
yes You can replace the default one in order to load decorator instances from different sources (e.g. you could use Spring managed beans)
Display tag library - Configuration
Description