Web app DTD provided by
servlet spec is so hard to read, partly because of this dense language partly because of alphabetical layout.
I am sure there are many sites where you can find well described DD, one of them is on Weblogic site -- very well thought out, layed out, memorizes much easier.
http://edocs.bea.com/wls/docs61/webapp/web_xml.html#1017571 P.S. It's nearly 100% compliant with 2.3 spec. It has some very minor things specific to Weblogic, like values -1,-2 for <session-timeout> but they always tell you that they are WL-specific.
[ March 06, 2002: Message edited by: Gennady Shapiro ]