using CALL TRANSFORMATION with parameters

[rainer_hbenthal]

Hi,

im using

    CALL TRANSFORMATION ztest
    PARAMETERS mestyp = 'MT_XI_START' 
    SOURCE email = p_email retention = it_alert_retention count = it_alert_count
    RESULT XML xxml.

I would like to output this like

<mestyp>MT_XI_START</mestyp>

So how do i code it in the XSLT, i used $MESTYP, and several other writings, but mestyp is never substituted, regadless if i have

  <xsl:param name="MESTYP" />

in my xslt or not.

Using the element mestyp as an binding in the SOURCE is not an option!

[rainer_hbenthal]

solved by my own