/usr/share/doc/libvirt-doc/examples/xml/ is in libvirt-doc 0.9.8-2ubuntu17.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/Makefile.am
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/Makefile.in.gz
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/allow-arp.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/allow-dhcp-server.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/allow-dhcp.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/allow-incoming-ipv4.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/allow-ipv4.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/clean-traffic.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-arp-ip-spoofing.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-arp-mac-spoofing.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-arp-spoofing.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-ip-multicast.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-ip-spoofing.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-mac-broadcast.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-mac-spoofing.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-other-l2-traffic.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/no-other-rarp-traffic.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/qemu-announce-self-rarp.xml
/usr/share/doc/libvirt-doc/examples/xml/nwfilter/qemu-announce-self.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/
/usr/share/doc/libvirt-doc/examples/xml/storage/pool-dir.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/pool-fs.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/pool-logical.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/pool-netfs.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/vol-cow.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/vol-qcow.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/vol-qcow2.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/vol-raw.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/vol-sparse.xml
/usr/share/doc/libvirt-doc/examples/xml/storage/vol-vmdk.xml
/usr/share/doc/libvirt-doc/examples/xml/test/
/usr/share/doc/libvirt-doc/examples/xml/test/testdev.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testdomfc4.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testdomfv0.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testnetdef.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testnetpriv.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testnode.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testnodeinline.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testpool.xml
/usr/share/doc/libvirt-doc/examples/xml/test/testvol.xml