Re: [xsl] Finding preceeding-siblings with non empty value

[Hank Ratzesberger <hankr@xxxxxxxx>]

Hi,

I have solved my issue (I'm sure you're glad to hear I'm closing this 
thread)

I found it a little complicated because there were issues of document order
and how predicate steps and filter steps select nodes. I found my answers
in Michael Kay's 2004 XPath Programmers reference p. 231 and this 
discussion:

http://www.dpawson.co.uk/xsl/sect2/N2624.html#d4142e301

To find the most recent element from nodeset created by a for-each-group,
I had to select from a path expression (not a predicate step), in this 
case a
union. Assuming that the [last()] predicate step processes in document 
order,
it will return the most recent (in this case the group-by was a date).

e.g.

<xsl:copy-of 
select="(preceding::pressure/row[site-transaction-name='serial 
number'])[last()]"/>

Thanks for your patience.  I'm still believe strongly in using this 
methodology --
utilizing a single/general data rather than creating various lists, 
arrays and
hashes and coding uniquely for them.

Best,
Hank


On 7/22/11 10:35 AM, Hank Ratzesberger wrote:
> <pressure  xmlns="">
>      <row>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>       <site-transaction-name>additional information</site-transaction-name>
>       <site-transaction-value>Meteo sonde delivered unreliable data&#xD;
> at the end</site-transaction-value>
>       <effective-date>1998-11-15T00:00:00.000</effective-date>
>
>      </row>
>      <row>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>       <site-transaction-name>serial number</site-transaction-name>
>       <site-transaction-value>69855</site-transaction-value>
>       <effective-date>1998-11-15T00:00:00.000</effective-date>
>      </row>
>
>      <row>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>       <site-transaction-name>model code</site-transaction-name>
>       <site-transaction-value>PARMT3</site-transaction-value>
>       <effective-date>1998-11-15T00:00:00.000</effective-date>
>      </row>
>      <row>
>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>       <site-transaction-name>data frequency</site-transaction-name>
>       <site-transaction-value>60 s</site-transaction-value>
>       <effective-date>1998-11-15T00:00:00.000</effective-date>
>      </row>
>      <row>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>
>       <site-transaction-name>elev diff to gps</site-transaction-name>
>       <site-transaction-value>-4 m    (with respect to marker)</site-transaction-value>
>       <effective-date>1998-11-15T00:00:00.000</effective-date>
>      </row>
>     </pressure>
>     <pressure  xmlns="">
>      <row>
>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>       <site-transaction-name>elev diff to gps</site-transaction-name>
>       <site-transaction-value>-4 m    (with respect to marker)</site-transaction-value>
>       <effective-date>2000-07-20T00:00:00.000</effective-date>
>      </row>
>      <row>
>       <site-transaction-type>pressure sensor</site-transaction-type>
>        <site-transaction-name>serial number</site-transaction-name>
>       <site-transaction-value>70804</site-transaction-value>
>       <effective-date>2000-07-20T00:00:00.000</effective-date>
>      </row>
>     </pressure>
>     <pressure  xmlns="">
>      <row>
>        <site-transaction-type>pressure sensor</site-transaction-type>
>       <site-transaction-name>elev diff to gps</site-transaction-name>
>       <site-transaction-value>-3.83 m  (with respect to marker)</site-transaction-value>
>       <effective-date>2001-02-19T00:00:00.000</effective-date>
>      </row>
>     </pressure>

--
Louis (Hank) Ratzesberger
hankr@xxxxxxxx
Scripps Orbit and Permanent Array Center
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