Can you reuse fragments of XML (in some kind of variables/references way)?

<StyledLayerDescriptor>
  <NamedLayer>
    <UserStyle>
      <FeatureTypeStyle>
        <Rule>
          <Filter>
            <PropertyIsEqualTo>
              <PropertyName>object_type</PropertyName>
              <Literal>1</Literal>
            </PropertyIsEqualTo>
          </Filter>
          <PointSymbolizer>
            <Graphic>
              <ExternalGraphic>
                <OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="/images/1.png" />
                <Format>image/png</Format>
              </ExternalGraphic>
              <Size>16</Size>
              <Opacity>1</Opacity>
            </Graphic>
          </PointSymbolizer>
          <TextSymbolizer>
            <Label>
              <ogc:PropertyName>name</ogc:PropertyName>
            </Label>
            <Font>
              <CssParameter name="font-family">Times New Roman</CssParameter>
              <CssParameter name="font-style">Normal</CssParameter>
              <CssParameter name="font-size">12</CssParameter>
            </Font>
            <Fill>
              <CssParameter name="fill">#110011</CssParameter>
              <CssParameter name="fill-opacity">1</CssParameter>
            </Fill>
            <Halo />
          </TextSymbolizer>
        </Rule>

        <Rule>
          <Filter>
            <PropertyIsEqualTo>
              <PropertyName>object_type</PropertyName>
              <Literal>2</Literal>
            </PropertyIsEqualTo>
          </Filter>
          <PointSymbolizer>
            <Graphic>
              <ExternalGraphic>
                <OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="/images/2.png" />
                <Format>image/png</Format>
              </ExternalGraphic>
              <Size>16</Size>
              <Opacity>1</Opacity>
            </Graphic>
          </PointSymbolizer>
          <TextSymbolizer>
            <Label>
              <ogc:PropertyName>name</ogc:PropertyName>
            </Label>
            <Font>
              <CssParameter name="font-family">Times New Roman</CssParameter>
              <CssParameter name="font-style">Normal</CssParameter>
              <CssParameter name="font-size">12</CssParameter>
            </Font>
            <Fill>
              <CssParameter name="fill">#110011</CssParameter>
              <CssParameter name="fill-opacity">1</CssParameter>
            </Fill>
            <Halo />
          </TextSymbolizer>
        </Rule>
      </FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>

<StyledLayerDescriptor>
  <NamedLayer>
    <CommonStyles>
      <TextSymbolizer id="name_times_normal_12">
    	<Label>
    	  <ogc:PropertyName>name</ogc:PropertyName>
    	</Label>
    	<Font>
    	  <CssParameter name="font-family">Times New Roman</CssParameter>
    	  <CssParameter name="font-style">Normal</CssParameter>
    	  <CssParameter name="font-size">12</CssParameter>
    	</Font>
    	<Fill>
    	  <CssParameter name="fill">#110011</CssParameter>
    	  <CssParameter name="fill-opacity">1</CssParameter>
    	</Fill>
    	<Halo />
      </TextSymbolizer>
    </CommonStyles>
    <UserStyle>
      <FeatureTypeStyle>
        <Rule>
          <Filter>
            <PropertyIsEqualTo>
              <PropertyName>object_type</PropertyName>
              <Literal>1</Literal>
            </PropertyIsEqualTo>
          </Filter>
          <PointSymbolizer>
            <Graphic>
              <ExternalGraphic>
                <OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="/images/1.png" />
                <Format>image/png</Format>
              </ExternalGraphic>
              <Size>16</Size>
              <Opacity>1</Opacity>
            </Graphic>
          </PointSymbolizer>
          <TextSymbolizer ref="#name_times_normal_12" />
    	</Rule>
        <Rule>
          <Filter>
            <PropertyIsEqualTo>
              <PropertyName>object_type</PropertyName>
              <Literal>2</Literal>
            </PropertyIsEqualTo>
          </Filter>
          <PointSymbolizer>
            <Graphic>
              <ExternalGraphic>
                <OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="/images/2.png" />
                <Format>image/png</Format>
              </ExternalGraphic>
              <Size>16</Size>
              <Opacity>1</Opacity>
            </Graphic>
          </PointSymbolizer>
          <TextSymbolizer ref="#name_times_normal_12" />
        </Rule>
      </FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>