In:
<xsl:sequence select="$values[.]"/>
... the context when opening the predicate is
$values and not the current item from the for-each.
In:
<xsl:sequence select="$values[current()]"/>
... the context when opening the predicate begins
at $values but current() jumps the context back
to the beginning of the XPath expression, which
is the current item from the for-each.
So it is readily explained. And it isn't a
difference between for and for-each, it is that
your predicate value either uses the context of
the XPath node test (the ".") or ignores the
context of the node test (the $i and current()).
I hope this helps.
. . . . . Ken
At 2021-03-14 18:05 +0000, Michael Müller-Hillebrand mmh(_at_)docufy(_dot_)de
wrote:
Folks,
Given a variable with a sequence of values
<xsl:variable name="values" select="(1,2,3,4,5)" as="xs:double+"/>
these are three methods to report its content:
<xsl:sequence select="for $i in 1 to count($values) return $values[$i]"/>
<xsl:for-each select="1 to count($values)">
<xsl:sequence select="$values[.]"/>
</xsl:for-each>
<xsl:for-each select="1 to count($values)">
<xsl:sequence select="$values[current()]"/>
</xsl:for-each>
The first works as expected, the second does
not, but the third astonishingly enough gives me
the same result as the first. Check it out:
https://xsltfiddle.liberty-development.net/ei5R4v8/2
I read/understand that there is a difference
between a for expression and a path expression,
but since we can use atomized values in
xsl:for-each, I would like to see more similarity between for and for-each.
Should this be on the wishlist for XSLT 4 or do
I have to learn/understand some more concepts?
Puzzled greeting,
- Michael
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