RE: [xsl] Recursive selection, elegantly

Thanks everyone... noted use of 'variable' to add to my usage as well as
current(), which solves the problem perfectly. Final soln (in effect):

  <xsl:template match="menu" mode="main_menu">
    <table>
    <tr>
      <xsl:apply-templates select="//*[@about = current()/item/@resource]"
mode="menu_item" />
    </tr>
    </table>
  </xsl:template>

  <xsl:template match="*" mode="menu_item">
    <td>
      <a href="{@about}">
        <xsl:value-of select="name" />
      </a>
    </td>
  </xsl:template>

-----Original Message-----
From: Marcus Andersson [mailto:marcus@xxxxxxxxxx]
Sent: 06 June 2004 01:48 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Recursive selection, elegantly


How about this one:

   <xsl:template match="/root">
     <html>
       <head>
         <title/>
       </head>
       <body>
         <table>
           <tr>
             <xsl:apply-templates select="menu/item"/>
           </tr>
         </table>
       </body>
     </html>
   </xsl:template>

   <xsl:template match="item">
     <xsl:variable name="resource" select="/root/*[@about =
current()/@resource]"/>
     <td><a href="{$resource/@about}"><xsl:value-of
select="$resource/name"/></a></td>
   </xsl:template>

/Marcus

Stephen Tredrea wrote:
> Thanks Mukul for your response (and showing me how to use {} - that's new
to
> me). Unfortunately your solution doesn't cater for instances where:
>
>   a) an item in the menu is not a 'page', or
>   b) only a selection of resources constitute the menu
>
> ...which is why I want to build the menu from the menu node.
>
> My apologies for providing an insufficient sample, here's alternative xml:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <root>
>    <menu ref="main_menu">
>      <item resource="/"/>
>      <item resource="/who_we_are"/>
>      <item resource="/contact_us"/>
>      <item resource="/mulberries"/>
>    </menu>
>    <page about="/">
>      <name>Home</name>
>    </page>
>    <page about="/who_we_are">
>      <name>About us</name>
>    </page>
>    <page about="/contact_us">
>      <name>Contact us</name>
>    </page>
>    <page about="/disclaimer">
>      <name>Disclaimer</name>
>    </page>
>    <category about="/mulberries">
>      <name>Top fruit</name>
>    </category>
> </root>
>
> Note that in this sample I don't want 'Disclaimer' in the menu.
>
> This XSL below works but... I think it's clunky and I don't understand why
> the simpler version I provided in my prior example doesn't work.
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="1.0"
>   xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>
>   <xsl:output method="html" version="1.0" encoding="UTF-8" indent="yes"/>
>
>   <xsl:template match="/">
>      <xsl:apply-templates select="//menu[@ref='main_menu'"
mode="main_menu"
> />
>   </xsl:template>
>
>   <xsl:template match="menu" mode="main_menu">
>     <table>
>     <tr>
>       <xsl:apply-templates select="item" />
>     </tr>
>     </table>
>   </xsl:template>
>
>   <xsl:template match="item">
>     <xsl:param name="resource"><xsl:value-of select="@resource"
> /></xsl:param>
>     <xsl:apply-templates select="/root/*[@about = $resource]"
> mode="menu_item" />
>   </xsl:template>
>
>   <xsl:template match="*" mode="menu_item">
>     <td>
>       <a href="{@about}">
>         <xsl:value-of select="name"/>
>       </a>
>     </td>
>   </xsl:template>
> </xsl:stylesheet>
>
> Regard, Stephen
>
> -----Original Message-----
> From: Mukul Gandhi [mailto:mukul_gandhi@xxxxxxxxx]
> Sent: 06 June 2004 10:02 AM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: Re: [xsl] Recursive selection, elegantly
>
>
> Hi Stephen,
>   Given the XML -
>
> <?xml version="1.0" encoding="UTF-8"?>
> <root>
>    <menu ref="main_menu">
>      <item resource="/"/>
>      <item resource="/who_we_are"/>
>      <item resource="/contact_us"/>
>      <item resource="/disclaimer"/>
>    </menu>
>    <page about="/">
>      <name>Home</name>
>    </page>
>    <page about="/who_we_are">
>      <name>About us</name>
>    </page>
>    <page about="/contact_us">
>      <name>Contact us</name>
>    </page>
>    <page about="/disclaimer">
>      <name>Disclaimer</name>
>    </page>
> </root>
>
> The following XSL -
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> <xsl:output method="html" version="1.0"
> encoding="UTF-8" indent="yes"/>
>
> <xsl:template match="/root">
>   <html>
>     <head>
>       <title/>
>     </head>
>     <body>
>       <table>
> 	<tr>
> 	  <xsl:apply-templates select="page"/>
> 	</tr>
>       </table>
>     </body>
>   </html>
> </xsl:template>
>
> <xsl:template match="page">
>   <td>
>     <a href="{@about}">
>       <xsl:value-of select="name"/>
>     </a>
>   </td>
> </xsl:template>
>
> </xsl:stylesheet>
>
> produces output -
>
> <html>
> <head>
>   <title></title>
> </head>
> <body>
>   <table>
>     <tr>
>       <td><a href="/">Home</a></td>
>       <td><a href="/who_we_are">About us</a></td>
>       <td><a href="/contact_us">Contact us</a></td>
>       <td><a href="/disclaimer">Disclaimer</a></td>
>     </tr>
>   </table>
> </body>
> </html>
>
> Regards,
> Mukul
>
> --- Stephen Tredrea <stephen.tredrea@xxxxxxxxxxxxx>
> wrote:
>
>>Any suggestion on getting this to work? I can do it
>>in four steps but not in
>>three as attempted here!
>>
>>Thanks, Stephen
>>
>>XML (snippet):
>>
>>  <menu ref="main_menu">
>>    <item resource="/" />
>>    <item resource="/who_we_are" />
>>    <item resource="/contact_us" />
>>    <item resource="/disclaimer" />
>>  </menu>
>>
>>  <page about="/">
>>    <name>Home</name>
>>  </page>
>>
>>  <page about="/who_we_are">
>>    <name>About us</name>
>>  </page>
>>
>>  ...etc...
>>
>>XSL (snippet):
>>
>>  <xsl:template match="/">
>>    <xsl:apply-templates
>>select="//menu[@ref='main_menu'" mode="main_menu"
>>/>
>>  </xsl:template>
>>
>>  <xsl:template match="menu" mode="main_menu">
>>    <table>
>>    <tr>
>>      <xsl:apply-templates select="//*[@about =
>>item/resource]"
>>mode="menu_item" />
>>    </tr>
>>    </table>
>>  </xsl:template>
>>
>>  <xsl:template match="*" mode="menu_item">
>>    <td>
>>      <xsl:element name="a">
>>        <xsl:attribute name="href"><xsl:value-of
>>select="@about"
>>/></xsl:attribute>
>>        <xsl:value-of select="name" />
>>      </xsl:element>
>>    </td>
>>  </xsl:template>
>>
>>Required HTML:
>>
>>  <table>
>>  <tr>
>>    <td><a href="/">Home</a></td>
>>    <td><a href="/who_we_are">About us</a></td>
>>    ...etc...
>>  </tr>
>>  </table>
>>
>>
>>
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