I collect from an XML document a list of the distinct tasks performed during multiple sessions with:
<fo:block>
<xsl:text>Projects Tasked: </xsl:text>
<xsl:value-of select="distinct-values(//Session/@task)"/>
</fo:block>
This produces a correct list of all the distinct tasks from multiple occurrences of the same tasks:
LS Authorities Maintenance Administration Meeting

Which I want to put in the PDF document punctuated as:
LS Authorities, Maintenance, Administration, Meeting.
where ("LS Authorities" is recorded as a single task despite its internal space).

Can this be done with the information given?

<xsl:value-of select="distinct-values(//Session/@task)"
              separator=", "/>
<xsl:text>.</xsl:text>

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