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Using Geoserver, is there any way that I can add a predefined string: "No. " to a property: postalnumber?

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up vote 7 down vote accepted

The SLD spec includes a string concatenation function. Here's an example of how to use it with labels:

            <ogc:Function name="Concatenate">
              <ogc:Literal>No. </ogc:Literal>

The above was tested on geoserver version 2.1.

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