Umherirrender, can you provide an example XML dump that doesn't validate when it should (or if the problem is that it validates when it shouldn't, that would also be helpful as a separate example). Thanks!

Try to validate a logdump (pages-logging.xml.gz from http://download.wikimedia.org/backup-index.html).

It looks like the 0.5 xsd file has added most of that stuff in r79877 -- anything else missing, other than the file itself being missing from its canonical location (bug 29819)?

When validate a xml log dump. I get the following error:
Validation of the XML Document failed! Error message(s):
The element 'mediawiki' in namespace 'http://www.mediawiki.org/xml/export-0.5/' has invalid child element 'logitem' in namespace 'http://www.mediawiki.org/xml/export-0.5/'. List of possible elements expected: 'http://www.mediawiki.org/xml/export-0.5/:page'. Line: 1 Column:1890

I have done the necessary change to the xsd with gerrit 9517

successfully merged