XSLT transformation of XML string

Question

Hello Everyone,
This is my first endeavor to use XSLT and XML in our newly upgraded system.  I can't for the life of me figure out what is wrong with my code and would appreciate someone just glancing over it and pointing out what is likely a realy dumb problem.
I have a program that reads a PEXR2002 IDoc. For testing purposes, I've hardcoded that IDoc number. It runs fine, creates the XML fine, the xslt in STRANS tests fine as well...but in the end my ls_table is blank.  I've been fuddling with this for a while and would really appreciate another pair of eyes taking a look at it.
THANKS!!
Greg
My program. (xslt is below...really simple, but it's my first time).
TYPES: BEGIN OF ty_table,
        sndprn LIKE edidc-sndprn,
        bgmref TYPE edif1004_r,
        moabetr TYPE edif5004_a,
        credat TYPE edidat8,
        datum TYPE edidat8,
      END OF ty_table.
DATA: o_idoc TYPE REF TO cl_idoc_xml1, str type string, ls_table type ty_table. 
CREATE OBJECT o_idoc
  EXPORTING
    docnum = '0000000000211014'.
CALL METHOD o_idoc->get_xmldata_as_string
  IMPORTING
    data_string = str.
CALL TRANSFORMATION ZUSL_PEXR2002_V1
SOURCE XML str
RESULT HEADER_DATA = ls_table.
My XSLT....
<xsl:transform
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:asx="http://www.sap.com/abapxml"
    xmlns:sap="http://www.sap.com/sapxsl" version="1.0">
  <xsl:strip-space elements="*"/>
  <xsl:template match="/">
    <asx:abap version="1.0">
      <asx:values>
        <HEADER_DATA>
          <SNDPRN>
            <xsl:value-of select="PEXR2002/IDOC/EDI_DC40/SNDPRN"/>
          </SNDPRN>
          <BGMREF>
            <xsl:value-of select="PEXR2002/IDOC/E1IDKU1/BGMREF"/>
          </BGMREF>
          <MOABETR>
            <xsl:value-of select="PEXR2002/IDOC/E1IDKU5/MOABETR"/>
          </MOABETR>
          <CREDAT>
            <xsl:value-of select="PEXR2002/IDOC/EDI_DC40/CREDAT"/>
          </CREDAT>
          <DATUM>
            <xsl:value-of select="PEXR2002/IDOC/E1EDK03/DATUM"/>
          </DATUM>
        </HEADER_DATA>
      </asx:values>
    </asx:abap>
  </xsl:template>
</xsl:transform>

Answer 1

Hi Greg,
please try it with the following (just slightly) modified transformation (works fine for me):
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
               xmlns:asx="http://www.sap.com/abapxml"
               xmlns:sap="http://www.sap.com/sapxsl"
               version="1.0">
  <xsl:strip-space elements="*"/>
  <xsl:template match="/PEXR2002/IDOC">
    <asx:abap version="1.0">
      <asx:values>
        <HEADER_DATA>
          <SNDPRN>
            <xsl:value-of select="EDI_DC40/SNDPRN"/>
          </SNDPRN>
          <BGMREF>
            <xsl:value-of select="E1IDKU1/BGMREF"/>
          </BGMREF>
          <MOABETR>
            <xsl:value-of select="E1IDKU5/MOABETR"/>
          </MOABETR>
          <CREDAT>
            <xsl:value-of select="EDI_DC40/CREDAT"/>
          </CREDAT>
          <DATUM>
            <xsl:value-of select="E1EDK03/DATUM"/>
          </DATUM>
        </HEADER_DATA>
      </asx:values>
    </asx:abap>
  </xsl:template>
</xsl:transform>
I recommend to test all transformations that you define on a sample source and check the output. If you apply your original transformation you would see that it basically doesn't select anything and therefore you just get an XML document with the field names but no values.
Cheers, harald