RE: [xsl] Slow XSLT

[Cleyton Jordan <cleytonjordan@xxxxxxxxxxx>]

Hi Michael and David,

I would like to thank you for all your input and 
help. It is really appreciated.

I will try to use the the vanilla push-processing
coding style demonstrated by David Carlisle's
responses to improve the speed of my transformation
for the rows.

Michael, you are right I was typing everything using
the browser and made lots of mistake in my code
examples. I am sorry about that.

David, thanks again for your example code.

Just for completeness, this an extract of my xml but
well formatted. The Rows and Columns can grow a lot:

<?xml version="1.0"?>
  <Report>
    <Measures>
      <Measure idx="1" heading="Total Pages"/>
      <Measure idx="2" heading="Cost"/>
    </Measures>
    <Columns>
      <ColGrp heading="Year">
        <Col heading="2003"/>
        <Col heading="2004"/>
      </ColGrp>
    </Columns>
    <Rows>
      <RowGrp heading="Name 1">
        <Row heading="A">
          <Cell/>
          <Cell>
            <Msr idx="1" val="42.00"/>
            <Msr idx="2" val="64230"/>
          </Cell>
        </Row>
        <Row heading="Other">
          <Cell/>
          <Cell>
            <Msr idx="1" val="36.00"/>
            <Msr idx="2" val="35820"/>
          </Cell>
        </Row>
        <Row heading="Another">
          <Cell>
            <Msr idx="1" val="14.20"/>
            <Msr idx="2" val="128030"/>
          </Cell>
          <Cell/>
        </Row>
      </RowGrp>
      <RowGrp heading="">
        <Row heading="Totals">
          <Cell>
            <Msr idx="1" val="14.20"/>
            <Msr idx="2" val="128030.00"/>
          </Cell>
          <Cell>
            <Msr idx="1" val="78.00"/>
            <Msr idx="2" val="100050.00"/>
          </Cell>
        </Row>
      </RowGrp>
    </Rows>
  </Report>



--- Michael Kay <mike@xxxxxxxxxxxx> wrote:

> > 
> > For each Row in my xml I need to output a <tr>. So
> I apply templates. 
> > 
> > <xsl:variable name=set" select="Report/Rows//Row"
> /> .....
> >  <xsl:apply-templates select="$set"/>
> 
> If you're only using the variable once, then this is
> exactly equivalent to:
> 
> <xsl:apply-templates select="Report/Rows//Row"/>
> .....
> 
> That doesn't mean it's wrong to declare a variable
> and use it only once, I'm
> just pointing out the equivalence. Your arguments
> that you are using a
> variable because of the intervening RowGrp elements
> don't make sense -
> that's an argument for using "//" in the middle of
> this path, but not an
> argument for using a variable.
> 
> > 
> > <xsl:template name="Row">
> > ......
> > <tr>
> >  <xsl:param name="set"/>
> >   <xsl:apply-templates
> select="$set[postion()]/*"/> 
>   </tr> 
> > <xsl:template>
> 
> There are a couple of syntax errors here, and a
> couple of semantic errors. 
> 
> 1. If xsl:param appears in an xsl:template, then it
> must come first
> 
> 2. postion() should be position()
> 
> 3. as already pointed out, the predicate
> [position()] is legal but
> meaningless
> 
> 4. (and I suspect this is the root cause of your
> confusion), you're
> declaring a parameter $set, and not giving it a
> value. The $set inside your
> template bears no relationship to the $set in the
> calling code, they are two
> different variables that just happen to have the
> same name. You could give
> them the same value if the caller did
> <xsl:with-param name="set"
> select="$set"/>, but I can't see why you would want
> to. If you don't give
> the parameter a value, then the default is a
> zero-length string, and I would
> expect that to cause a type error when you do
> apply-templates, on the
> grounds that you can only apply templates to nodes,
> not to strings.
> 
> I haven't seen anything in your problem description
> that indicates why you
> need to make things so complicated. Perhaps I've
> missed something - you keep
> hinting that you haven't shown us the whole problem.
> From all I've seen, you
> can solve the problem using the vanilla
> push-processing coding style
> demonstrated by David Carlisle's responses.
> 
> Michael Kay
> http://www.saxonica.com/
> 
> 



		
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