libvirt users - Oct 2016 - domain schema fails to validate sysinfo element

I'm puzzled why virt-xml-checker rejects minimal config xml if it includes
sysinfo element:

<domain type='kvm'>
  <name>example</name>
  <sysinfo>
  </sysinfo>
</domain>

with the following error:

Relax-NG validity error : Extra element sysinfo in interleave
minimal.xml:3: element sysinfo: Relax-NG validity error : Element domain failed
to validate content
minimal.xml fails to validate

I tried xmllint it gives the same output

On 13.10.2016 02:55, mordenkainen wrote:
> I'm puzzled why virt-xml-checker rejects minimal config xml if it
includes sysinfo element:
> 
> <domain type='kvm'>
>   <name>example</name>
>   <sysinfo>
>   </sysinfo>
> </domain>
> 
> with the following error:
> 
> Relax-NG validity error : Extra element sysinfo in interleave
> minimal.xml:3: element sysinfo: Relax-NG validity error : Element domain
failed to validate content
> minimal.xml fails to validate
Sigh. I wish libxml2 would report more sane error messages. But if we
stretch it enough it can make sense. Just a little. Basically, this
error message says, the problem is with sysinfo element. So opening up
our RNG schema (docs/schemas/domaincommon.rng) you can search for
conditions we put onto the element:

  <define name="sysinfo">
    <element name="sysinfo">
      <attribute name="type">
        <value>smbios</value>
      </attribute>
      ...
    </element>
  </define>

So, the element <sysinfo/> MUST have attribute named 'type' with
value
'smbios'. Therefore if I fix your small XML:

<domain type='kvm'>
  <name>example</name>
  <sysinfo type='smbios'>
  </sysinfo>
</domain>

it validates just fine.

Michal