Xslt graph in a rtf template. Can an external variable be used inside the graph definition?

Question

I'm working with BI Publisher 10g, building an rtf template that would display a table and a graph by iterating on one of the xml tags from the input file.
I got the table working using am xslt variable set when the xml tag associated value changes (DATAGROUPID).
<?for-each:(/DATA/SITE/SITE_DATA)?> <?sort:DATAGROUPID;'ascending';data-type='number'?>
<?xdoxslt:set_variable($_XDOCTX,'SITE',DATAGROUPID)?>
<?for-each:(/DATA//DIMS/LOCALES[LOCALE = 'en']/TEXT)?><?sort:DIMNAME;'ascending';data-type='text'?>
<?xdoxslt:set_variable($_XDOCTX,'DIMID',DIMID)?>
<?round(/DATA/SITE/SITE_DATA[DATAGROUPID = xdoxslt:get_variable($_XDOCTX,'SITE')]/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = xdoxslt:get_variable($_XDOCTX,'DIMID')]/ITEM[ITEMID = 0]/PFAV)?>
<?end for-each?>
chart:
<Graph seriesEffect="SE_AUTO_GRADIENT" graphType="BAR_VERT_PERCENT" autoLayout="AL_AS_NEEDED">
<LegendArea visible="true" automaticPlacement="AP_NEVER" position="LAP_BOTTOM"/>
<SeriesItems>
<Series id="0" color="#FF0000"/>
<Series id="1" color="#FFFF00"/>
<Series id="2" color="#00FF00"/>
</SeriesItems>
<MarkerText visible="true" markerTextPlace="MTP_CENTER">
<GraphFont name="Arial" size="20" bold="true" italic="false" underline="false"/>
<Y1ViewFormat>
<ViewFormat decimalDigit="0" decimalSeparatorUsed="true" decimalDigitUsed="true"/>
</Y1ViewFormat>
</MarkerText>
<LegendText>
<GraphFont name="Arial" size="20" bold="false" italic="false" underline="false"/>
</LegendText>
<Y1TickLabel>
<GraphFont name="Arial" size="12" bold="false" italic="false" underline="false"/>
</Y1TickLabel>
<O1TickLabel wordWrapEnabled="false" tickLabelStaggered="false">
<GraphFont name="Arial" size="20" bold="true" italic="false" underline="false"/>
</O1TickLabel>
<LocalGridData colCount="{count(xdoxslt:group(/DATA/SITE/SITE_DATA/YEAR[SURVEYYEAR = 2012]/DIM, 'DIMID'))}" rowCount="3">
<RowLabels>
<Label>Unfavorable        </Label>
<Label>Neutral</Label>
<Label>Favorable</Label>
</RowLabels>
<ColLabels>
<xsl:for-each select="/DATA/DIMS/LOCALES[LOCALE = 'en']/TEXT">
<xsl:sort select="DIMNAME"/>
<Label>
<xsl:value-of select="DIMNAME"/>
</Label>
</xsl:for-each>
</ColLabels>
<DataValues>
<RowData>
<xsl:for-each select="/DATA/DIMS/LOCALES[LOCALE = 'en']/TEXT">
<xsl:sort select="DIMNAME"/>
<Cell>
<xsl:variable name="DIMID" select="DIMID"/>
<xsl:value-of select="/DATA/SITE/SITE_DATA/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = $DIMID]/ITEM[ITEMID = 0 and PUNFAV != 0]/PUNFAV"/>
</Cell>
</xsl:for-each>
</RowData>
<RowData>
<xsl:for-each select="/DATA/DIMS/LOCALES[LOCALE = 'en']/TEXT">
<xsl:sort select="DIMNAME"/>
<Cell>
<xsl:variable name="DIMID" select="DIMID"/>
<xsl:value-of select="/DATA/SITE/SITE_DATA/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = $DIMID]/ITEM[ITEMID = 0 and PNEU != 0]/PNEU"/>
</Cell>
</xsl:for-each>
</RowData>
<RowData>
<xsl:for-each select="/DATA/DIMS/LOCALES[LOCALE = 'en']/TEXT">
<xsl:sort select="DIMNAME"/>
<Cell>
<xsl:variable name="DIMID" select="DIMID"/>
<xsl:value-of select="/DATA/SITE/SITE_DATA/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = $DIMID]/ITEM[ITEMID = 0 and PFAV !=0]/PFAV"/>
</Cell>
</xsl:for-each>
</RowData>
</DataValues>
</LocalGridData>
</Graph>
<?end for-each?>
So, on the table this line gets the correct variable from the input file:
<?round(/DATA/SITE/SITE_DATA[DATAGROUPID = xdoxslt:get_variable($_XDOCTX,'SITE')]/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = xdoxslt:get_variable($_XDOCTX,'DIMID')]/ITEM[ITEMID = 0]/PFAV)?>
How can I replicate that logic inside the table definition?
<xsl:value-of select="/DATA/SITE/SITE_DATA/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = $DIMID]/ITEM[ITEMID = 0 and PFAV !=0]/PFAV"/>
Input data looks like this:
<DATA>
- <SITE>
- <SITE_DATA> 
<DATAGROUPID>1032817</DATAGROUPID>  
<DATAGROUPNAME>My Sales</DATAGROUPNAME>  
- <YEAR> 
<SURVEYYEAR>2012</SURVEYYEAR>  
- <DIM> 
<DIMID>1</DIMID>  
- <ITEM> 
<ITEMID>0</ITEMID>  
<PFAV>88</PFAV>  
<PNEU>13</PNEU>  
<PUNFAV>0</PUNFAV>
- <ITEM> 
<ITEMID>40</ITEMID>  
<PFAV>100</PFAV>  
<PNEU>0</PNEU>  
<PUNFAV>0</PUNFAV>  
</ITEM>
</DIM>
</YEAR>
</SITE_DATA>
- <SITE_DATA> 
<DATAGROUPID>1032816</DATAGROUPID>  
<DATAGROUPNAME>Your Sales</DATAGROUPNAME>  
- <YEAR> 
<SURVEYYEAR>2012</SURVEYYEAR>  
- <DIM> 
<DIMID>1</DIMID>  
- <ITEM> 
<ITEMID>0</ITEMID>  
<PFAV>71</PFAV>  
<PNEU>25</PNEU>  
<PUNFAV>4</PUNFAV>  
I can include a complete sample on request, I thought this would be enough to illustrate the issue.
I'll appreciate any help you can provide.

Answer 1

I kept researching, I found some possible solution in this blog:
https://blogs.oracle.com/xmlpublisher/category/Oracle/Templates/RTF
so, I created a local SITE variable inside every cell to get the external SITE info:
<Cell>
<xsl:variable name="DIMID" select="DIMID"/>
<xsl:variable name="SITE" select="{xdoxslt:get_variable($_XDOCTX,'SITE')}"/>
<xsl:value-of select="/DATA/SITE/SITE_DATA[DATAGROUPID = $SITE]/YEAR[SURVEYYEAR = 2012]/DIM[DIMID = $DIMID]/ITEM[ITEMID = 0 and PUNFAV != 0]/PFAV"/>
</Cell>
but I get this error at run time:
oracle.xdo.parser.v2.XPathException: Error in expression: '{xdoxslt:get_variable($_XDOCTX,'SITE')}'.
    at oracle.xdo.parser.v2.XSLProcessor.reportException(XSLProcessor.java:806)
    at oracle.xdo.parser.v2.XSLProcessor.newXSLStylesheet(XSLProcessor.java:571)
    ... 14 more
What am I doing wrong?