[xsl] Basic XSLT 3.0 question about "map"

Hi Folks,

I am trying to learn the "map" in XSLT 3.0

I copied the following example straight from the spec:

--------------------------------------------------------------------
<?xml version="1.0"?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                            
xmlns:map="http://www.w3.org/2011/xpath-functions/map";
                            version="3.0">
    
    <xsl:template match="/">
        <xsl:sequence select="map:keys(map{1:='yes', 2:='no'})" />
    </xsl:template>
    
</xsl:transform>
--------------------------------------------------------------------

When I run it in oXygen 15.0 I get this error:

XPath syntax error at char 0 on line 9 in 
        {map:keys(map{1:='yes', 2:='no'...}: 
Cannot find a matching 1-argument function named        
{http://www.w3.org/2011/xpath-functions/map}keys()

What am I doing wrong please?

/Roger

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