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Re: [xsl] different evaluations on sibling elements ...


Subject: Re: [xsl] different evaluations on sibling elements ...
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Tue, 27 Aug 2013 17:37:36 +0100

Yes, sorry, a mistake I often make: within the function, all the relative path
expressions should start with $entry. So

>> <xsl:variable name="this" select="dateTime($entry/isodate, $entry/time)"/>
>> <xsl:variable name="next"
select="dateTime($entry/following-sibling::entry/isodate,
$entryfollowing-sibling::entry/time)"/>

Michael Kay
Saxonica


On 27 Aug 2013, at 17:26, Raimund Kammering wrote:

> Wow I really missed a lot - would have made my live much easier if I would
have started right away using the XSLT 2.0!
>
> Okay I got the concept and the <xsl:for-each-group  group-by=""> seams to
be the key to an easy solution - Thanks!
> But unfortunately I still don't get it working! Here are some of my
findings/questions:
>
> There is one misplaced bracket:
>> <xsl:value-of select="current-grouping-key(), ': ',
format-number(sum(current-group()/f:duration-in-hours(.), '0.00'))"/>
> should be:
> <xsl:value-of select="current-grouping-key(), ': ',
format-number(sum(current-group()/f:duration-in-hours(.)), '0.00')"/>
>
> The following is not working:
>> <xsl:variable name="this" select="dateTime(/isodate, time)"/>
> I guess this should be:
> <xsl:variable name="this" select="dateTime(entry/isodate, entry/time)"/>
>
> But even though I'm getting an exception saying:
>
> "XPDY0002: Axis step child::element('':entry) cannot be used here: the
context item is undefined"
>
> Okay I also found some discussions concerning functions and undefined
context item. But what I understood from these was just that one must add an
parameter and call the function passing the node to process, but this is
exactly as you (Michael) proposed!?
>
> Raimund Kammering
>
> On 27.08.2013, at 11:52, Michael Kay <mike@xxxxxxxxxxxx> wrote:
>
>> Ignoring all your existing logic, I think the summary can be done something
like this:
>>
>> <xsl:for-each-group select="//entry" group-by="statistics_category">
>> <xsl:value-of select="current-grouping-key(), ': ',
format-number(sum(current-group()/f:duration-in-hours(.), '0.00'))"/>
>> </xsl:for-each-group>
>>
>> <xsl:function name="f:duration-in-hours" as="xs:double" >
>> <xsl:param name="entry" as="element(entry)"/>
>> <!-- TODO: add logic for the case where there's no following-siblng -->
>> <xsl:variable name="this" select="dateTime(/isodate, time)"/>
>> <xsl:variable name="next"
select="dateTime(following-sibling::entry/isodate,
following-sibling::entry/time)"/>
>> <xsl:sequence select="($next - $this) div xs:duration('PT1H')"/>
>> </xsl:function>
>>
>> Michael Kay
>> Saxonica


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