Following metadata.xml is invalid, but repoman -x doesn't complain <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd"> <herd>maintainer-needed</herd>
RepoMan does full XML Schema verification of metadata.xml nowadays, so it should cover it.
Fixed in repoman-2.3.0: https://gitweb.gentoo.org/proj/portage.git/commit/?id=2d2b99917ed054bea083a0e47f30aac34f0fefdd