Re: [xsl] Constructing a Map Using xsl:for-each-group

["Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Your <map:entry> elements should be <xsl:map-entry>.

Had me baffled for a bit.

Michael Kay
Saxonica

> On 26 May 2018, at 00:06, Eliot Kimber ekimber@xxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> 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