Multiple conditions in single key statement

Dear All,

Is it possible to define a key element with union of two different
conditions? My requirement is as follows:

XML: Two D structures are in the same file.

<D AN="0019053-200826080-00002" V="2000.3F" FILE="G0019053-200826080-00002">
<BB>
<BY>
<PN ILINK="1" ITYPE="sp">
    <FN>Joep</FN><SN>Damen</SN>
</PN>
<PN ILINK="2" ITYPE="sp">
<FN>Sue</FN><SN>Caleo</SN>
</PN>
<AF>
<P>
<SP>1</SP> Pharmerit BV, Rotterdam, the Netherlands</P>
<P>
<SP>2</SP> Janssen Pharmaceutica NV, Beerse, Belgium</P>
</AF>
</BY>
</BB>
</D>
<D AN="0019053-200826080-00004" V="2000.3F" FILE="G0019053-200826080-00004">
<BB>
<BY>
<PN ILINK="1" ITYPE="sp">
<FN>Emily</FN>
<SN>Lancsar</SN></PN>
<PN ILINK="2" ITYPE="sp">
<FN>Jordan</FN>
<SN>Louviere</SN></PN>
<AF>
<P>
<SP>1</SP> Business School (Economics) and Institute of Health and
Society, University of Newcastle upon Tyne, Newcastle upon Tyne,
UK</P>
<P>
<SP>2</SP> Centre for the Study of Choice, University of Technology,
Sydney, New South Wales, Australia</P></AF>
</BY>
</BB>
</D>

The desired output is:

Author-Name: Joep Damen
Author-Name-First: Joep
Author-Name-Last: Damen
Author-Workplace-Name: Pharmerit BV, Rotterdam, the Netherlands

Author-Name: Sue Caleo
Author-Name-First: Sue
Author-Name-Last: Caleo
Author-Workplace-Name: Janssen Pharmaceutica NV, Beerse, Belgium

Author-Name: Emily Lancsar
Author-Name-First: Emily
Author-Name-Last: Lancsar
Author-Workplace-Name: Business School (Economics) and Institute of
Health and Society, University of Newcastle upon Tyne, Newcastle upon
Tyne, UK

Author-Name: Jordan Louviere
Author-Name-First: Jordan
Author-Name-Last: Louviere
Author-Workplace-Name: Centre for the Study of Choice, University of
Technology, Sydney, New South Wales, Australia


My XSLT:

<xsl:key name="affid" match="D/BB/BY/AF/P" use="SP"/>
<xsl:template match="PN">
<xsl:choose>
<xsl:when test="@ILINK">
Author-Name: <xsl:value-of select="FN"/><xsl:text> </xsl:text><xsl:if
test="MN"><xsl:value-of select="MN"/>. </xsl:if><xsl:value-of
select="SN"/> <xsl:apply-templates/>
<xsl:variable name="affk" select="key('affid',@ILINK])"/>
<xsl:value-of select="$affk"/>
</xsl:when>
</xsl:chose>
</xsl:template>

But I am getting the output as follows:


Author-Name: Joep Damen
Author-Name-First: Joep
Author-Name-Last: Damen
Author-Workplace-Name: 1 Pharmerit BV, Rotterdam, the Netherlands
Author-Workplace-Name: 1 Business School (Economics) and Institute of
Health and Society, University of Newcastle upon Tyne, Newcastle upon
Tyne, UK

Author-Name: Sue Caleo
Author-Name-First: Sue
Author-Name-Last: Caleo
Author-Workplace-Name: 2 Janssen Pharmaceutica NV, Beerse, Belgium
Author-Workplace-Name: 2 Centre for the Study of Choice, University of
Technology, Sydney, New South Wales, Australia

Author-Name: Emily Lancsar
Author-Name-First: Emily
Author-Name-Last: Lancsar
Author-Workplace-Name: 1 Pharmerit BV, Rotterdam, the Netherlands
Author-Workplace-Name: 1 Business School (Economics) and Institute of
Health and Society, University of Newcastle upon Tyne, Newcastle upon
Tyne, UK

Author-Name: Jordan Louviere
Author-Name-First: Jordan
Author-Name-Last: Louviere
Author-Workplace-Name: 2 Janssen Pharmaceutica NV, Beerse, Belgium
Author-Workplace-Name: 2 Centre for the Study of Choice, University of
Technology, Sydney, New South Wales, Australia

As per the logic of the key element this output is correct. But it is
not my desired format. The only way of differentiation is @AN in the D
element.

So in the key element is it possible to include union of two
conditions such as use="concat(@AN, SP) " to check with key('affkey',
concat(@AN, @ILINK)).

Please suggest the above will give the result or any better solution
for this case.

Regards,
Ganesh