Subject: [xsl] Constructing a Map Using xsl:for-each-group From: "Eliot Kimber ekimber@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 25 May 2018 23:05:48 -0000 |
I want to construct a map where the keys are attribute values and the entries contain the elements that exhibit those attribute values. The obvious way to do this is with for-each-group: <xsl:variable name="links-by-target-id" as="map(xs:string, element()*)"> <xsl:map> <xsl:for-each-group select="$docbook-links" group-by="@linkend"> <map:entry key="{current-grouping-key()}"> <xsl:sequence select="current-group()"/> </map:entry> </xsl:for-each-group> </xsl:map> </xsl:variable> However, using Saxon 9.8.0.8 from Oxygen I get this message: "Required item type of xsl:map sequence constructor is map(*); supplied value (xsl:for-each-group) has item type element(). The expression can succeed only if the supplied value is an empty sequence." The XSLT spec says that the contents of <xsl:map> is a sequence constructor, which for-each-group certainly is. Is this message legit? I don't see how it can be but maybe I'm missing a subtlety in the map instruction? Thanks, Eliot -- Eliot Kimber http://contrext.com
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