I believe (although am not 100% sure because I haven't tried it myself) that xmlValidation="true" means that TC's XML parser should check all XML against the DTD defined in each XML source. With xmlValidation="false", it will check that the xml is "well-formed" but not that it is "valid".
See these refs: http://www.w3.org/TR/REC-xml/#dt-valid http://www.w3.org/TR/REC-xml/#dt-wellformed So I think (?) that if you set xmlValidation="true", you must include a DTD link in each XML source. If you do not have one, this might be why you are getting a stacktrace. The reason for the long stacktrace is that the parsing is done by a generic parser bundled into TC, so the TC authors cannot control the call stack, or when exceptions are thrown or the exception messages - they simply wrap them with a higher level exception as appropriate. If it helps, I have reported a similar issue where I thought that TC's wrapping exception message could be made clearer to users. Not sure about Xerces 2.2 but ISTR that there is some issue with a change to the XML parser that ships with TC, this issue is mentioned in 5.5.x release notes so that might be worth a look up http://tomcat.apache.org/tomcat-5.5-doc/RELEASE-NOTES.txt . See also "XML Parsers and J2SE 1.4" at bottom of http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html - this might be relevant? > -----Original Message----- > From: Bob Bronson [mailto:[EMAIL PROTECTED] > Sent: Wednesday 26 October 2005 04:24 > To: tomcat-user@jakarta.apache.org > Subject: ? xmlValidation Attribute -- What's it Mean ? > > > Hi all, > > I'm using TC 5.5.12. > > Please look at this snippet from the server.xml that is distributed > with TC: > > <!-- Define the default virtual host > Note: XML Schema validation will not work with Xerces 2.2. > --> > <Host name="localhost" appBase="webapps" > unpackWARs="true" autoDeploy="true" > xmlValidation="false" xmlNamespaceAware="false"> > > > Can anyone tell me what the 'xmlValidation' attribute on > <Host> is for? > Obviously it has something to do with "XML validation" but > what XML? Is > it the corresponding web.xml? And how does the 'xmlNamespaceAware' > attribute fit in? Every web.xml I've ever seen uses the default > namespace? > > And what's the comment about the Xerces 2.2 parser? I'm using > Sun's JDK > 1.5.0. Does that use Xerces internally? > > When I set the 'xmlValidation' attribute to 'true' I get a big stack > trace. One would think it might be appropriate to offer a nice error > message describing the problem. > > I've looked at the latest TC documentation for <Host> and it makes no > mention of the 'xmlValidation' attribute: > http://tomcat.apache.org/tomcat-5.5-doc/config/host.html > > Can someone please explain these two attributes? My web.xml > is getting > unwieldy and I'd like to start validating it. > > Thanks very much. > > -- > Bob Bronson > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
