Andrea Aime ha scritto:
  > The idea of using the fallback value as defined by SE 1.1
> was also proposed by Jody.
> I'm a little twisted about using that, since it's really
> a SE 1.1 specific extension:
> 
> <xsd:complexType name="FunctionType" abstract="true">
>      <xsd:complexContent>
>          <xsd:extension base="ogc:FunctionType">
>              <xsd:attribute name="fallbackValue" type="xsd:string" 
> use="required"/>
>          </xsd:extension>
>      </xsd:complexContent>
> </xsd:complexType>
> 
> on the other side is more compact than using a second
> argument.

Ah, reading the SE 1.1 spec, page 38 (page 46 of the pdf):

The value of the fallbackValue attribute is used as a default value, if 
the SE implementation does not support the function. If the 
implementation supports the function, then the result value is 
determined by executing the function

So using fallback as the default value would be improper usage,
as we do support the function

Cheers
Andrea

-- 
Andrea Aime
OpenGeo - http://opengeo.org
Expert service straight from the developers.

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