Re: [xsl] Conditional display of dates

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Hi Katie,

At 02:40 PM 12/19/01, you wrote:
> I am trying to display a date.  I need to display the "Original Date" if 
> it is returned.

Getting the value of the node will return the value if the node exists, but 
nothing if it does not.

>   If a Record with Name = ORIGINAL does not exist or the record with Name 
> = ORIGINAL exists but a date for that record does not, I need to display 
> the "Copy Date" (Name = COPY).

The second case subsumes the first (if the ORIGINAL record does not exist, 
neither will it have a date), so we need to test only if there is (not) a date.

The template below does this, dropping the ORIGINAL date into a variable (a 
node-set that either holds the date, or is empty) to make things a bit clearer.

<xsl:template match="RecordSet">
  <xsl:variable name="originalDate"
    select="Record/Name[.='ORIGINAL']/RecordHistorySet/RecordHistroy/Date"/>
  <!-- bind the node to the variable -->

  <!-- we want its value (which is nothing if it doesn't exist) -->
  <xsl:value-of select="$originalDate"/>

  <!-- if it does not exist, we get the other value -->
  <xsl:if test="not($originalDate)">
    <xsl:value-of
      select="Record/Name[.='COPY']/RecordHistorySet/RecordHistroy/Date"/>
  </xsl:if>

</xsl:template>

Does that help? A node-set tests as "true" if there is a node in the 
node-set, "false" if not.

Cheers,
Wendell



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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
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