uri of taglib question

when the uri is a symbolic name , something like-<%@taglib prfix="r" uri="symbolicName">who does the container know where to find the tld file ?where is the location of the symbolicName is wriiten?thanks in advanced.
[257 byte] By [ppl1a] at [2007-11-27 1:37:08]
# 1
nevermind..i get that
ppl1a at 2007-7-12 0:47:24 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...