I have following taglibs defined in my jsp page (maven project):

<%@ taglib prefix="ctrl"
           uri="http://www.common-controls.com/cc/tags-ctrl"%>
<%@ taglib prefix="bean" uri="http://struts.apache.org/tags-bean"%>
<%@ taglib prefix="html" uri="http://struts.apache.org/tags-html"%>
<%@ taglib prefix="forms"
           uri="http://www.common-controls.com/cc/tags-forms"%>
<%@ taglib prefix="util"
           uri="http://www.common-controls.com/cc/tags-util"%>
<%@ taglib prefix="base"
           uri="http://www.common-controls.com/cc/tags-base"%>
<%@ taglib prefix="infonova" uri="http://infonova.com/tags-infonova"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%>    
<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt_rt"%>

All, except for the last two 'c', 'fmt' are detected by Netbeans, meaning code completion and coloring (boldness) would work for all other except the two.

Deploying it on the glassfish app server would work just fine without errors, but Netbeans just does not detect them. I fiddled around with the URLs by googling them, but nothing would change.

Product Version = NetBeans IDE 7.3 (Build 201302132200)
Operating System = Linux version 3.5.0-26-generic running on amd64
Java; VM; Vendor = 1.7.0_17
Runtime = Java HotSpot(TM) 64-Bit Server VM 23.7-b01