Re: [xsl] CSV output - select using xpath in variable

[Nick Leaton <nickle@xxxxxxxxx>]

Thanks. I'll have a look at evaulate.

At least 2.0 fixed the select from a parameter e.g.
$message/trade/instrument and you don't have to use a node set
function! :-)

Nick

On Fri, Jun 11, 2010 at 8:58 AM, Imsieke, Gerrit, le-tex
<gerrit.imsieke@xxxxxxxxx> wrote:
> Dear Nick,
>
> dynamic evaluation of XPath expressions is not (yet?) available in standard
> XSLT 2. Have you looked at saxon:evaluate?
> http://www.saxonica.com/documentation/extensions/functions/evaluate.html
>
> Gerrit
>
>
> On 11.06.2010 09:48, Nick Leaton wrote:
>>
>> I'm trying to get a variant on the XSLT cookbook template to output csv
>>
>>
>>
http://books.google.co.uk/books?id=6q50V7oykqEC&lpg=PP1&pg=PA240#v=onepage&q=
delimiter&f=false
>>
>> Page 240-241
>>
>> It uses XSLT 2.0 and parts of it are quite neat.
>>
>> I like the idea of importing a generic module, and then defining the
>> columns to export in the importing module.
>>
>> I want to extend it to hand different delimiters, in the same way, and
>> also different line terminators.
>>
>> The next extension is correctly quoting the output if it containts
>> quotes in strings etc.
>>
>> So far, I can do this.
>>
>> However, there is one problem I can't solve.
>>
>> My input data is not regular, but CSV output needs to be regular. So I
>> want to defined the column names like this
>>
>>   <xsl:variable
>>       name="columns"
>>       select="
>>       'trade',
>>       'trade',
>>       'currency',
>>       'isin'
>>       "
>>       as="xs:string*"
>>   />
>>
>> and the path names to get the data like this
>>
>>
>>   <xsl:variable
>>       name="nodepaths"
>>       select="
>>       'tradeid',
>>       'trader',
>>       'currency',
>>       'instrument/isin'
>>       "
>>       as="xs:string*"
>>   />
>>
>> The interesting part is the isin. To get the path from the input
>> fragment, it is an xpath.
>>
>> So if I had
>>
>> <xsl:variable name="path" select="instrument/isin" as="xs:string"/>
>>
>> and
>>
>> <xsl:variable name="message">
>>   <message>
>>        <trade>
>>              <tradeid>1</tradeid>
>>              <trader>Nick</trader>
>>              <currency>USD</currency>
>>              <instrument>
>>                     <isin>US0123456789</isin>
>>              </instrument>
>>          <trade>
>>   </message>
>> <xsl:variable>
>>
>> I want to do something like
>>
>>      <xsl:value-of select="$message/$path"/>
>>
>> and have it return US0123456789
>>
>> What's the best way?
>>
>> --
>> Nick
>>
>
> --
> Gerrit Imsieke
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>



--
Nick