The customizer might also choose to use a third-party tag library, or one of their own custom tag libraries, for use in the custom task page. They would need to include a "taglib" directive at the top of their page to specify the location of the custom tag library. If they were to specify a custom tag library, they might choose to use the same location as Windchill tags (WEB-INF/tags). However, it is recommended that they use a unique prefix of their own (we use "tags" as a prefix). Otherwise, they would have to make sure that they have unique tag names.