RE: [xsl] how do you determine if a property exists?

["Michael Kay" <mhk@xxxxxxxxx>]

Your template rule:

<xsl:template match="mytag">
		<xsl:element name="myelement">
			<xsl:attribute name="time">
				<xsl:choose>
					<xsl:when
test="@duration=''">1</xsl:when>
					<xsl:when
test="not(@duration)">1</xsl:when>
					<xsl:otherwise><xsl:value-of
select="@duration"/></xsl:otherwise>
				</xsl:choose>
			</xsl:attribute>
		</xsl:element>
	</xsl:template>

can be written in XSLT 2.0 as

<xsl:template match="mytag">
  <myelement time="{if (@duration != '') then @duration else 1}"/>
</xsl:template>

or in 1.0 as

<xsl:template match="mytag">
  <myelement time="1">
    <xsl:if test="@duration != ''">
    	<xsl:attribute name="time">
        <xsl:value-of select="@duration"/>
      </xsl:attribute>
    </xsl:if>
  </myelement>
</xsl:template>

Michael Kay

 

> -----Original Message-----
> From: David Buddrige [mailto:dbuddrige@xxxxxxxxx] 
> Sent: 16 April 2004 01:21
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] how do you determine if a property exists?
> 
> thanks everyone.  The solution I settled on was:
> 
> <?xml version="1.0" encoding="iso-8859-1"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> 	<xsl:template match="/">
> 		<myoutput>
> 			<xsl:apply-templates/>
> 		</myoutput>
> 	</xsl:template>
> 	<xsl:template match="mytag">
> 		<xsl:element name="myelement">
> 			<xsl:attribute name="time">
> 				<xsl:choose>
> 					<xsl:when 
> test="@duration=''">1</xsl:when>
> 					<xsl:when 
> test="not(@duration)">1</xsl:when>
> 					<xsl:otherwise><xsl:value-of
> select="@duration"/></xsl:otherwise>
> 				</xsl:choose>
> 			</xsl:attribute>
> 		</xsl:element>
> 	</xsl:template>
> </xsl:stylesheet>
> 
> which given the input data:
> 
> <?xml version="1.0" encoding="iso-8859-1"?>
> <info>
> 	<mytag duration="3 days" />
> 	<mytag />
> 	<mytag duration="6 hours" />
> 	<mytag duration="33 hours" />
> 	<mytag duration="" />
> 	<mytag duration="13 hours" />
> 	<mytag duration="5 days" />
> 	<mytag duration="" />
> 	<mytag duration="3 hours" />
> 	<mytag duration="23 hours" />
> </info>
> 
> 
> produces:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?><myoutput>
> 	<myelement time="3 days"/>
> 	<myelement time="1"/>
> 	<myelement time="6 hours"/>
> 	<myelement time="33 hours"/>
> 	<myelement time="1"/>
> 	<myelement time="13 hours"/>
> 	<myelement time="5 days"/>
> 	<myelement time="1"/>
> 	<myelement time="3 hours"/>
> 	<myelement time="23 hours"/>
> </myoutput>
> 
> thanks again! 8-)
> 
> David.
> 
> 
> --- Wendell Piez <wapiez@xxxxxxxxxxxxxxxx> wrote:
> > At 11:49 AM 4/15/2004, 'twas written:
> > ><xsl:template match="/info">
> > ><results>
> > >   <xsl:for-each select='mytag'>
> > >     <xsl:element name='myelement'>
> > >       <xsl:choose>
> > >         <xsl:when test='@duration != ""'>
> > >           <xsl:copy-of select='@duration'/>
> > >         </xsl:when>
> > >         <xsl:otherwise>
> > >           <xsl:attribute
> > name='duration'>1</xsl:attribute>
> > >         </xsl:otherwise>
> > >       </xsl:choose>
> > >     </xsl:element>
> > >   </xsl:for-each>
> > ></results>
> > ></xsl:template>
> > 
> > Or:
> > 
> > <xsl:template match="/info">
> >    <results>
> >      <xsl:for-each select='mytag'>
> >        <myelement duration='1'>
> >          <xsl:copy-of
> > select='@duration[normalize-space()]'/>
> >        </myelement>
> >      </xsl:for-each>
> >    </results>
> > </xsl:template>
> > 
> > Take your pick: clarity vs. succinctness.
> > 
> > Cheers,
> > Wendell
> > 
> > 
> > 
> >
> ======================================================================
> > Wendell Piez                           
> > mailto:wapiez@xxxxxxxxxxxxxxxx
> > Mulberry Technologies, Inc.               
> > http://www.mulberrytech.com
> > 17 West Jefferson Street                    Direct
> > Phone: 301/315-9635
> > Suite 207                                         
> > Phone: 301/315-9631
> > Rockville, MD  20850                                
> > Fax: 301/315-8285
> >
> ----------------------------------------------------------------------
> >    Mulberry Technologies: A Consultancy Specializing
> > in SGML and XML
> >
> ======================================================================
> > 
> 
> 
> 
> 	
> 		
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