Java EE (Java Enterprise Edition) General Discussion

Hi
i'm using Jdeveloper 9.0.3 to develop my JSP pages.
i'm a begiiner in JSP world & I want to use jsp tag libraries.
i've tried this :
<%@taglib uri="/lib/core.jar" prefix="c" %>
and there were 2 errors :
Error(5): java.io.FileNotFoundException: META-INF/taglib.tld not found in the jar file
Error(5): Unable to load taghandler class: /lib/core.jar

what is (taglib.tld) and how could i found it ? -- error 1
how to make it possible to enable to load the taghandler class:/lib/core.jar ? -- error 2

thank you