On 07.10.2020 00:33, Michael Kay mike(_at_)saxonica(_dot_)com wrote:
Your private:block element is matched by a different "accumulator
instance" from the one that matches the page element; an accumulator
instance corresponds to one document, and accumulator instances for
different documents don't interact. Otherwise, there would be a terrible
dependency on order of processing.
Saxon evaluates unstreamed accumulators lazily: the first time you
evaluate accumulator-before, or accumulator-after, on any node in a
particular document, the accumulator values are computed for all nodes
in that document.
Now I wonder whether nevertheless the sample shows that the accumulator
wrongly did not fire for the parentless element.
A shorter test case is
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
exclude-result-prefixes="#all"
version="3.0">
<xsl:accumulator name="a1" as="xs:string" initial-value="'init'">
<xsl:accumulator-rule match="foo" select="$value || ', matched '
|| path()"/>
</xsl:accumulator>
<xsl:param name="p1">
<foo/>
</xsl:param>
<xsl:param name="p2" as="element(foo)">
<foo/>
</xsl:param>
<xsl:template name="xsl:initial-template">
<xsl:apply-templates select="$p1/node(), $p2"/>
</xsl:template>
<xsl:template match="foo">
<foo-processed accumulator-value="{accumulator-before('a1')}"
root="{node-name(root())}"/>
</xsl:template>
</xsl:stylesheet>
when run with Saxon 10.2 HE with option -it it outputs
<?xml version="1.0" encoding="UTF-8"?><foo-processed
accumulator-value="init, matched /Q{}foo[1]" root=""/><foo-processed
accumulator-value="init" root="foo"/>
Shouldn't the rule for `foo` elements be applied as well to the
parentless `foo` and therefore it should have an accumulator-before
value different from the "init" initial value?
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