Unicode question

Hi out there,



I have a problem that is Unicode related. Some Unicode characters (for
instance emojis) can have some code *following* the actual character to
indicate a variant. For instance in the following stylesheet, the emoji
character in $x (U+1F61C) is followed by U+DE1C. When I look in oXygen it
shows me this. But when I run the stylesheet it reports a string length of 1
and only a single codepoint.



I suppose that is true, it is only  single character. But how can I find out
(in XPath) what the value of the second bcharacterb (indicator?) is? Or is
that impossible anyway?



Thanks,

Erik Siegel



PS Running this in the latest oXygen using Saxon 9.8.







<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" expand-text="true">



  <xsl:template match="/">

    <xsl:variable name="x" as="xs:string" select="'p'"/>

    <test length="{string-length($x)}">{ string-to-codepoints($x) }</test>

  </xsl:template>



</xsl:stylesheet>