Perhaps this should be in a FAQ:
When migrating to TC4, I discovered a number of webapps gave errors like:
PARSE error at line 8 column -1
org.xml.sax.SAXParseException: Element type "web-app" is not declared.
and
PARSE error at line 11 column -1
org.xml.sax.SAXParseException: Element type "taglib" is not declared.
It turns out this is because the DOCTYPE definition was missing from my web.xml
AND *.tld files.
For web.xml, you need:
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
or 2.3 instead of 2.2.
For *.tld, you need:
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
"http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
--Jeff
