maven config.xml

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>xml-maven-plugin</artifactId>
    <version>1.0</version>
    <executions>
        <execution>
            <goals>
                <goal>transform</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <transformationSets>
            <transformationSet>
                <dir>xsd</dir>
                <includes>
                    <include>wadl.sch</include>
                </includes>
                <stylesheet>xsl/iso-sch/iso_dsdl_include.xsl</stylesheet>
            </transformationSet>
            <transformationSet>
                <dir>target/generated-resources/xml/xslt</dir>
                <includes>
                    <include>wadl.sch</include>
                </includes>
                <stylesheet>xsl/iso-sch/iso_abstract_expand.xsl</stylesheet>
            </transformationSet>
            <transformationSet>
                <dir>target/generated-resources/xml/xslt</dir>
                <includes>
                    <include>wadl.sch</include>
                </includes>
                <stylesheet>xsl/iso-sch/iso_svrl_custom_xslt2.xsl</stylesheet>
    <parameters>
      <parameter>
    <name>select-contexts</name>
    <value>key</value>
      </parameter>
    </parameters>
                <fileMappers>
                    <fileMapper implementation="org.codehaus.plexus.components.io.filemappers.FileExtensionMapper">
                        <targetExtension>.xsl</targetExtension>
                    </fileMapper>
                </fileMappers>
            </transformationSet>
        </transformationSets>
    </configuration>
    <dependencies>
        <dependency>
            <groupId>net.sf.saxon</groupId>
            <artifactId>Saxon-HE</artifactId>
            <version>9.4.0-9</version>
        </dependency>
    </dependencies>
</plugin>