Is there support for using a tag library in a web application?
Yes. To learn how to access, create and use tags from tag libraries, see http://www.netbeans.org/kb/articles/tutorial-taglibrary-40.html The document refers to NetBeans 4.0, but the content is still relevant.
Note: The file was moved to the archive http://www.netbeans.org/kb/archive/index.html (Download NetBeans 4.0 Docs Archive).
<%@taglib prefix="disp" tagdir="/WEB-INF/tags" %>
Applies to: NetBeans 5.0, 5.5, 6.0, 6.1, 6.5, 6.7, 6.8, 6.9, 7.0, 7.1