RE: [xsl] Delete XML Node

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Deepak,

Given mapping rules like this, a template-based approach is *way* easier:

At 04:57 PM 10/31/2002, you wrote:
> Input XML                               Output XML
>
> <X>               maps to---->            <X1>

<xsl:template match="X">
  <X1>
    <xsl:apply-templates/>
  </X1>
</xsl:template>

>  <A>A</A>        maps to---->              <A1>A</A>

<xsl:template match="A">
  <A1>
    <xsl:apply-templates/>
  </A1>
</xsl:template>

>  <Y>             maps to--->               <Y1>
>                  if resultant <Y1>
>                  has got elements within it

I'm translating this into "maps to Y1 if the source Y contains a B with 
value "ABC" or a C with value "XYZ". This re-expression is necessary since 
you can inspect the source tree, but the result tree doesn't exist yet so 
you can't test the "resultant Y1":

<xsl:template match="Y">
  <xsl:if test="B[.='ABC'] or C[.='XYZ']">
    <Y1>
      <xsl:apply-templates/>
    </Y1>
  </xsl:if>
</xsl:template>

>    <B>B</B>      maps to---->                 <B1>B1</B1>
>                  only if data contained
>                  in <B> is "ABC"

<xsl:template match="B">
  <xsl:if test=". ='ABC'">
    <B1>
      <xsl:apply-templates/>
    </B1>
  </xsl:if>
</xsl:template>

Or more simply, if a Y will never have more than one B, you can do

<xsl:template match="B">
  <B1>
    <xsl:apply-templates/>
  </B1>
</xsl:template>

(Since you'll never even get to the B if the Y test was not passed, it's 
safe to just process it.)

>    <C>C</C>      maps to---->                 <C1>C1</C1>
>                  only if data contained
>                  in <C> is "XYZ"

like B, with appropriate adjustments

>   </Y>                                      </Y1>
> </X>                                         </X>
>
> According to the mapping rules for <B> and <C> the output XML should not 
> contain <B1> and <C1> and thus <Y1> would be empty. But <Y1> should appear 
> in the output only if <B1> or <C1> is present.

Put all these templates together in a stylesheet and try it out....

I hope this helps,
Wendell


======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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