following-sibling:: within a for-each

Hello everyone,

This is the first time I am experimenting with following-sibling:: and
am already stuck in here.

I have such a code here:

<xsl:if test="/*/*[substring(name(),8) = 'MeterPulse']">        
        <xsl:element name="MeterPulseFacility">                 
                <xsl:for-each select="/*/*[substring(name(),8) =
'MeterPulse']">                 <xsl:value-of select=" ...some
calculations... "/>
                        <xsl:text>,</xsl:text>
                </xsl:for-each>                                 
        </xsl:element>  
</xsl:if>

The "...some calculations..." outputs a plain number.  Following the
comma within the <xsl:text>,</xsl:text>

The output would be something like
3,2,1,

I wish to eliminate the last comma since there is no need for a further
separation.  I thought I could check if there actually is another
incoming sibling in the for-each, if yes then set the comma otherwise do
not set the comma.

<xsl:if test="/*/*[substring(name(),8) = 'MeterPulse']">        
        <xsl:element name="MeterPulseFacility">                 
                <xsl:for-each select="/*/*[substring(name(),8) =
'MeterPulse']">                 <xsl:value-of select=" ...some
calculations... "/>
                        <xsl:if
test="substring(following-sibling::node()/name(),8) = 'MeterPulse'">
                        <xsl:text>,</xsl:text>
                        </xsl:if>
                </xsl:for-each>                                 
        </xsl:element>  
</xsl:if>

However the way I wrote it seems to be wrong:
<xsl:if test="substring(following-sibling::node()/name(),8) =
'MeterPulse'">

Any comments please?

Many thanks,
Houman

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