JSTL function tld

Question

I'm using the ${fn:substring()}
If I include it like this it works fine.
<%@taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
but I much prefer to point the uri to something in my WEB-INF directory. This is for an intranet application and assures that an internet connection is not required for the application to run.
What would the correct tld be?

Answer 1

No change is required.
You are already using the correct URI, and it is not using the internet to look it up.
Note that this is a URI and not a URL.
The difference? In a nutshell:
URI is a unique identifier
URL specifies a location on the internet.
Take a look at the JSP Specification section 7.3.2
Basically it says that it does not look up the reference on the internet, but searches all tld files in scope to see if they specify the appropriate URI. tlds in scope include any under WEB-INF directory, and any in jar files.
The tld in this case is bundled in the file standard.jar
It is called fn.tld.
Inside that file:
<description>JSTL 1.1 functions library</description>
  <display-name>JSTL functions</display-name>
  <tlib-version>1.1</tlib-version>
  <short-name>fn</short-name>
  <uri>http://java.sun.com/jsp/jstl/functions</uri>And that is how it resolves http://java.sun.com/jsp/jstl/functions to the functions tld: fn.tld.
Cheers,
evnafets