I think the schemas are supposed to prevent any nilled parameter -i.e.
optional ones should be omitted not nilled. Although quite a lot of the
toolkits don't seem to acknowledge the difference.

Matthew

> -----Original Message-----
> From: Z39.50 Next-Generation Initiative [mailto:[log in to unmask]] 
> On Behalf Of Robert Sanderson
> Sent: 13 July 2004 12:42
> To: [log in to unmask]
> Subject: Nilled parameters
> 
> While we have a 'do not nill mandatory params' rule, it's 
> still acceptable to send nilled optional parameters.
> 
> But what should we do with these in the echoedQuery part of 
> the response?
> Return <recordSchema/> or just omit them?
> 
> Rob
> 
> 
>        ,'/:.          Dr Robert Sanderson ([log in to unmask])
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