Re: [xsl] Required item type of value of variable $images is element(); supplied value has item type text()

["Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Thatbs not how the as attribute is supposed to work. It serves as as a 
"treat as" assertion, not so much as a filter that drops nodes from a 
sequence.

You can filter out unwanted whitespace-only text nodes in at least 3 ways:

1. by declaring xsl:strip-space for certain contexts

2. by defining "empty" templates in ac:image mode that match 
text()[not(normalize-space())] in certain contexts

3. or by doing something like this:
<xsl:variable name="prelim" as="item()*">
  <xsl:apply-templates mode="ac:image"/>
</xsl:variable>
<xsl:variable name="images"as="element()*" select="$prelim/self::*"/>

Gerrit


On 31.03.2019 21:00, Martynas JuseviD
ius martynas@xxxxxxxxxxxxx wrote:
> Hi,
>
> I have a simple snippet like this
>
>          <xsl:variable name="images" as="element()*">
>              <xsl:apply-templates mode="ac:image"/>
>          </xsl:variable>
>
> Sometimes the ac:image templates will return an <img> element,
> sometimes nothing.
>
> In the case where there are no elements in the variable, I get an error
>
>      Required item type of value of variable $images is element();
> supplied value has item type text()
>
> When I output the text, it's just whitespace.
>
> The element() cardinality is *, so why can't the processor just
> suppress the whitespace and treat the variable content as zero
> elements?
>
> The processor is Saxon-CE BTW.
>
> Martynas
> atomgraph.com

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