web-server/doc/en/user/source/styling/sld/extensions/artifacts/vertices.sld

<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc"
  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
  <NamedLayer>
    <Name>Default Point</Name>
    <UserStyle>
      <FeatureTypeStyle>
        <Rule>
          <LineSymbolizer>
            <Stroke/>
          </LineSymbolizer>
          <PointSymbolizer>
            <Geometry><ogc:Function name="vertices"><ogc:PropertyName>the_geom</ogc:PropertyName></ogc:Function></Geometry>
            <Graphic>
              <Mark>
                <WellKnownName>square</WellKnownName>
                <Fill>
                  <CssParameter name="fill">#FF0000</CssParameter>
                </Fill>
              </Mark>
              <Size>6</Size>
            </Graphic>
          </PointSymbolizer>
        </Rule>

      </FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>