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[xsl] For-each-group group-starting-with drops text between inline elements

2020-09-03 10:20:18
I have a document with the following structure:
    <div>
        <p class="passage">
            <span class="itemNum">(1)</span>First <b>sentence</b> of the 
passage. <span class="itemNum">(2)</span> Second sentence of the passage. <span 
class="itemNum">(3)</span> Third sentence of the passage. 
        </p>
    </div>
    
    I need to chunk this into separte items:
    
    <div class="passage_set">
        <p class="item" itemNum="(1)"><b>(1)</b> First <b>sentence</b> of the 
passage.</p>
        <p class="item" itemNum="(2)"><b>(2)</b> Second sentence of the 
passage.</p>
        <p class="item" itemNum="(3)"><b>(3)</b> Third sentence of the 
passage.</p>
    </div>
    
    If there were no nodes in the text between spans, I could use tokenize, 
which I do on such occasions. 
    With sets such as the one above, I have been trying to use for-each-group. 
But I am unable to capture the text between the span elements.
    Here is the relevant section of my current stylesheet (3.0 Saxon-PE 
9.8.0.12):
    
    <xsl:variable name="passage_raw">
        <div class="passage_set">
            <xsl:for-each-group select="div/p[@class='passage']/*" 
group-starting-with="span">
                <xsl:text>&#10;</xsl:text>
                <p class="item">
                    <xsl:attribute name="itemNum">
                        <xsl:value-of select="current-group()[1]"/>
                    </xsl:attribute>
                    <xsl:copy-of select="current-group()"/>
                </p>
            </xsl:for-each-group>
        </div>
    </xsl:variable>
    
    Here is the output:
    
    <div class="passage_set">
        <p class="item" itemNum="(1)"><span 
class="itemNum">(1)</span><b>sentence</b></p>
        <p class="item" itemNum="(2)"><span class="itemNum">(2)</span></p>
        <p class="item" itemNum="(3)"><span class="itemNum">(3)</span></p>
    </div>
    
    I feel like I am close.
    Is there any way to capture the text following the span using grouping or 
any other method available in 3.0?

Any help would be much appreciated.

Terry
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