XSLT Transformation file Design View not opening in Jdeveloper

Problem :

                 Design View XSLT transformation file(.xsl) not showing/opening.

Cause :
              Probably,It happens when you export Project from em console and import it in Jdeveloper.
               which removes oracle-xsl-mapper tag which contains mapSources and mapTargets.

Solution :
             Try to add manually  <?oracle-xsl-mapper>  tag after xml start tag and above stylshhet tag with                                   corresponding mapSources and mapTargets.

Sample Oracle-xsl-mapper :  which generates in xsl file when you create first time in jdev.

<?oracle-xsl-mapper

   <mapSources>

    <source type="WSDL">

      <schema location="../sourceWsdlName.wsdl"/>

      <rootElement name="sourceRootElement" namespace="sourceWsdlNamespace"/>

    </source>

  </mapSources>

  <mapTargets>

    <target type="WSDL">

      <schema location="targetWsdlLocation"/>

      <rootElement name="targetRootElement" namespace="targetNamespace/"/>

    </target>

  </mapTargets>

 ?>

               

Add the above code to your xsl file above stylesheet tag and do changes accordingly to your source and target as mentioned in Bold.

Please refer below screens shots  :