Problem with SLD

[Vera Schulze]

Hi List,

I'm trying to use a SLD but it doesn't work at all.

What I'm trying to do with the SLD is to show just one symbol of my 
table "gps_data" (column "vehicle" and column "customer"). The result of 
the SLD should be to show just one specific vehicle symbol of a customer 
in the map.

Would be great if someone can give me an easy example?

Thank you in advance for any help.

Greetings,
Vera