C:\Program Files\OSGeo\MapGuide\Web\www\phpsamples\analyzing_features\bufferlayerdefinition.xml

<?xml version="1.0" encoding="UTF-8"?>

  <LayerDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:noNamespaceSchemaLocation="LayerDefinition-1.1.0.xsd" version="1.1.0">
    <VectorLayerDefinition>
      <ResourceId></ResourceId>
      <FeatureName>BufferClass</FeatureName>
      <FeatureNameType>FeatureClass</FeatureNameType>
      <Geometry>BufferGeometry</Geometry>
      <VectorScaleRange>
        <AreaTypeStyle>
          <AreaRule>
            <LegendLabel>Buffer</LegendLabel>
            <AreaSymbolization2D>
              <Fill>
                <FillPattern>Solid</FillPattern>
                <ForegroundColor>22AA00AA</ForegroundColor>
                <BackgroundColor>FF000000</BackgroundColor>
              </Fill>
              <Stroke>
                <LineStyle>Solid</LineStyle>
                <Thickness>0</Thickness>
                <Color>FF666666</Color>
                <Unit>Inches</Unit>
                <SizeContext>DeviceUnits</SizeContext>
              </Stroke>
            </AreaSymbolization2D>
          </AreaRule>
        </AreaTypeStyle>
      </VectorScaleRange>
    </VectorLayerDefinition>
  </LayerDefinition>