SLD parsing fail on GeoServer

Question

I created a custom style on QGis and saved as SLD file. When I added to GeoServer, after validation it, I got an errors about parsing.

Here is the error message below:

Parsing failed for Filter: java.lang.RuntimeException: Unable to find function Literal
line 26: cvc-complex-type.2.4.a: Invalid content was found starting with element 'ogc:Filter'. One of '{"http://www.opengis.net/ogc":expression}' is expected.
line 27: cvc-complex-type.2.4.a: Invalid content was found starting with element 'ogc:Literal'. One of '{"http://www.opengis.net/ogc":spatialOps, "http://www.opengis.net/ogc":comparisonOps, "http://www.opengis.net/ogc":logicOps, "http://www.opengis.net/ogc":_Id}' is expected.

<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd" xmlns:se="http://www.opengis.net/se">
  <NamedLayer>
    <se:Name>Some_Name</se:Name>
    <UserStyle>
      <se:Name>Some_Name</se:Name>
      <se:FeatureTypeStyle>
        <se:Rule>
          <se:Name>Single symbol</se:Name>
          <se:LineSymbolizer>
            <se:Stroke>
              <se:GraphicStroke>
                <se:Graphic>
                  <se:Mark>
                    <se:WellKnownName>line</se:WellKnownName>
                    <se:Fill>
                      <se:SvgParameter name="fill">#ff0000</se:SvgParameter>
                    </se:Fill>
                    <se:Stroke>
                      <se:SvgParameter name="stroke">#ff0000</se:SvgParameter>
                    </se:Stroke>
                  </se:Mark>
                  <se:Size>3</se:Size>
                </se:Graphic>
                <se:Gap>
                  <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
                    <ogc:Literal>1.2</ogc:Literal>
                  </ogc:Filter>
                </se:Gap>
              </se:GraphicStroke>
            </se:Stroke>
          </se:LineSymbolizer>
          <se:LineSymbolizer>
            <se:Stroke>
              <se:SvgParameter name="stroke">#ff0000</se:SvgParameter>
              <se:SvgParameter name="stroke-width">0.26</se:SvgParameter>
              <se:SvgParameter name="stroke-linejoin">bevel</se:SvgParameter>
              <se:SvgParameter name="stroke-linecap">square</se:SvgParameter>
            </se:Stroke>
            <se:PerpendicularOffset>1</se:PerpendicularOffset>
          </se:LineSymbolizer>
          <se:LineSymbolizer>
            <se:Stroke>
              <se:SvgParameter name="stroke">#ff0000</se:SvgParameter>
              <se:SvgParameter name="stroke-width">0.26</se:SvgParameter>
              <se:SvgParameter name="stroke-linejoin">bevel</se:SvgParameter>
              <se:SvgParameter name="stroke-linecap">square</se:SvgParameter>
            </se:Stroke>
            <se:PerpendicularOffset>-0.6</se:PerpendicularOffset>
          </se:LineSymbolizer>
        </se:Rule>
      </se:FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>

How can I resolve the parsing issue?

Answer 1

QGIS puts the filter tags but leaves out some essential parts that are needed by the validator in geoserver. So here's what you need to do:

in your filter tag add a PropertyIsEqualTo tag and within that add the PropertyName tag and the Literal tag.

So this:

  <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
    <ogc:Literal>1.2</ogc:Literal>
  </ogc:Filter>

Becomes this:

  <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
    <ogc:PropertyIsEqualTo>
      <ogc:PropertyName>FIELDNAME</ogc:PropertyName>
      <ogc:Literal>1.2</ogc:Literal>
    </ogc:PropertyIsEqualTo>
  </ogc:Filter>

Where FIELDNAME is the name of the field on which the filter is based. Then it should validate correctly.

Answer 2

if you change the StyleLayerDescriptor to this...it does validate

<StyledLayerDescriptor version="1.0.0" 
xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" 
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"
xmlns:se="http://www.opengis.net/se">

It might look similar but geoserver is a bit odd when it comes to SLDs

Answer 3

The parser is expecting an Expression at line 26 where you have a filter. So try removing the filter and just using the Literal (which is an expression).

I don't know if the GeoServer SLD parser will like it anyway as the Symbology Encoding support is patchy.