How do we do multiple extensibility arguments to an extensible
       arguments? From Steve T's email:

> ...  We had substantial debates on
> this issue, and decided not to deal with this in OGSI v1.0.  The problem is
> that this is a slippery slope.  In the general case, you might want to
> describe multiple input parameters, and associated multiple associated output
> parameters, faults, an other properties.  Where do you stop?  And how does
> this all relate to WSDL operation definitions?  Rather than start down this
> slipperly slope, we decided to do the absolute minimum necessary for v1.0, and
> all we needed for v1.0 is description of a single input parameter.

     - The background to this might be a good item for the primer.
 .