Which job-description attributes do you want to be optional?
> From rdebry at us.ibm.com Fri Jul 18 11:29:24 1997
>> I would like to make the following attributes optional.
> Making these mandatory puts a significant burden on
> some legacy printing systems upon which we might
> implement IPP. Furthermore, it is not clear that the
> information provided in these attributes is of such a
> critical nature that they should be mandatory.
>