Re: [PATCHv2 3/5] schema: Add nvme controller and nvme-ns bus defination

[ray wang]

> 
> So here the 'serial' is declared as mandatory. It's optional in the XML
> parser/formatter and mandatory in the commandline formatter. With other
> devices it's optional so it's most likely going to need an <optional>
> block.
> 
> This series is also completely lacking documentation
> (docs/formatdomain.rst) documenting bot the new controller and disk
> type.
As described earlier, the intention is for the serial field to be mandatory. 
Perhaps the parser/formatter handling led to some confusion? Any suggestions 
are very welcome.
I'll add documentation for it in docs/formatdomain.rst.