Re: for vs. for-each

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 [email protected] 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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