[mapserver-users] Is PropertyIsNull supported by MapServer?

[Eichner, Andreas - SID]

Whitespace might be significant, can you try
<ogc:PropertyIsNull>
  <ogc:PropertyName>YEAR</ogc:PropertyName>
</ogc:PropertyIsNull>

> -----Ursprüngliche Nachricht-----
> OpenLayers has a OpenLayers.Filter.Comparison.IS_NULL filter that produces
> XML such as:
> 
>             <ogc:PropertyIsNull>
>               <ogc:PropertyName>
>                 YEAR
>               </ogc:PropertyName>
>             </ogc:PropertyIsNull>