Re: Expression Logic Problem

While I can appreciate esthetics, the two things I am most concerned
with are correctness and efficiency. My XPath says find a field element
which is a child of a record element, then get the first field element
which is a child of the record element (at least that's what I think
it says, and that appears to be backed up by XPath Explorer.) That is
the most direct way I can see to get the desired element.

If it is incorrect and you or anyone else cares to explain why, I will
be anxious to learn.

Now as to the efficiency, I have no feelings. I suspect that the initial
double-slash could slow things down on a large document, and I can see
that replacing it with an absolute path the the document root might be
better, but I was hoping for a more practical reaction than one concerning
its comeliness.

-- 
Charles Knell
cknell@xxxxxxxxxx - email


---- "Robert S. Koberg" <rob@xxxxxxxxxx> wrote:
> hi,
> 
> Charles Knell wrote:
> > Let me recommend Purple Technology's XPath Explorer (http://sourceforge.net/projects/xpe/)
> > 
> > I copied your XML to a file, opened it in XPath Explorer, and determined
> > this XPath in a few seconds.:
> >   //record/field/../field[1]
> > 
> > or in expanded form:
> >   /descendant-or-self::node()/child::record/child::field/parent::node()/child::field[1.0]
> 
> this looks hideous
> 
> 
> > 
> > This may not be the most efficient XPath, but it is a good starting
> point.
> > 
> > 
> 
> I just noticed a cut & paste error in my code. I had:
> 
> <xsl:if test="not(@id=preceding-sibling::field[1]/@id)">
>  >
>  > <!-- perhaps use a key here? -->
>  >        <xsl:value-of
>  >           select="$/document/configure/server/resultfield[@id=$id]"/>
>  >        <xsl:text>: </xsl:text>
>  >     </xsl:if>
> 
> I was going to use a variable to save line space, but then switched
> back 
> but did not get the '$.' It is probably obvious but it should be:
> 
> <xsl:if test="not(@id=preceding-sibling::field[1]/@id)">
>  >
>  > <!-- perhaps use a key here? -->
> 
>          <xsl:value-of
>           select="/document/configure/server/resultfield[@id=$id]"/>
> 
>  >        <xsl:text>: </xsl:text>
>  >     </xsl:if>
> 
> -Rob
> 
> 
> 
> 
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> 
>  

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