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Re: [xsl] XSL2 string result from XSL1 template

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I'd be tempted to convert the named template into a function, and then
the calling code could be:

<xsl:variable name="fulltarget"
select="f:encode-url(concat($urlprefix,'docs/',$book,'/',$subf,'#',$jid))"
as="xs:string">

...where f:encode-url() returns a single item by wrapping another
function which returns the sequence (to avoid the need for
string-join).

fwiw, you can still use the "as" attribute on named templates:

<xsl:template name="whatever" as="xs:string">

which helps narrow down where the problem is (no good here though,
because of the way the result is built)


2009/4/14 Trevor Nicholls <trevor@xxxxxxxxxxxxxxxxxx>:
> Oh cool.
> I had forgotten that value-of could be used like that, but now you show it,
> it's obvious.
>
> Thank you
> T
>
> -----Original Message-----
> From: Michael Kay [mailto:mike@xxxxxxxxxxxx]
> Sent: Wednesday, 15 April 2009 12:40 a.m.
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] XSL2 string result from XSL1 template
>
> Your template is returning a sequence of text nodes. The simplest way to
> convert this to a single string is:
>
> <xsl:variable name="fulltarget" as="xs:string">
>  <xsl:value-of>
>    <xsl:call-template name="encode-url">
>      <xsl:with-param name="str"
> select="concat($urlprefix,'docs/',$book,'/',$subf,'#',$jid)" />
>    </xsl:call-template>
>  </xsl:value-of>
> </xsl:variable>
>
> the effect of the xsl:value-of instruction is to convert the sequence of
> text nodes into a single text node.
>
> Michael Kay
> http://www.saxonica.com/
>
>> -----Original Message-----
>> From: Trevor Nicholls [mailto:trevor@xxxxxxxxxxxxxxxxxx]
>> Sent: 14 April 2009 12:40
>> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
>> Subject: [xsl] XSL2 string result from XSL1 template
>>
>> I am running an XSL 2.0 stylesheet which includes some
>> ubiquitous XSL 1.0 stylesheets which provide some standard features.
>>
>> The variable definition here gives an error at runtime:
>>
>>   <xsl:variable name="fulltarget" as="xs:string">
>>     <xsl:call-template name="encode-url">
>>       <xsl:with-param name="str"
>> select="concat($urlprefix,'docs/',$book,'/',$subf,'#',$jid)" />
>>     </xsl:call-template>
>>   </xsl:variable>
>>
>> The error is XTTE0570: A sequence of more than one item is
>> not allowed as the value of variable $fulltarget
>>
>>
>> OK, I understand the error, and I could write an XSL 2
>> version of the encode-url template that would return a single
>> string, but how would I modify the CALLING stylesheet to work
>> with what I already have?
>>
>> The called template looks like this ($safe, $ascii, $latin1
>> and $hex are what you would expect):
>>
>>   <xsl:template name="encode-url">
>>     <xsl:param name="str"/>
>>     <xsl:if test="$str">
>>       <xsl:variable name="first-char" select="substring($str,1,1)"/>
>>       <xsl:choose>
>>         <xsl:when test="contains($safe,$first-char)">
>>           <xsl:value-of select="$first-char"/>
>>         </xsl:when>
>>         <xsl:otherwise>
>>           <xsl:variable name="charval">
>>             <xsl:choose>
>>               <xsl:when test="contains($ascii,$first-char)">
>>                 <xsl:value-of
>> select="string-length(substring-before($ascii,$first-char)) + 32"/>
>>               </xsl:when>
>>               <xsl:when test="contains($latin1,$first-char)">
>>                 <xsl:value-of
>> select="string-length(substring-before($latin1,$first-char)) + 160"/>
>>               </xsl:when>
>>               <xsl:otherwise>
>>                 <xsl:message terminate="no">Warning: string
>> contains an out of range character.</xsl:message>
>>                 <xsl:text>63</xsl:text>
>>               </xsl:otherwise>
>>             </xsl:choose>
>>           </xsl:variable>
>>         <xsl:variable name="hex-digit1"
>> select="substring($hex,floor($charval div 16) + 1,1)"/>
>>         <xsl:variable name="hex-digit2"
>> select="substring($hex,$charval mod
>> 16 + 1,1)"/>
>>         <xsl:value-of select="concat('%',$hex-digit1,$hex-digit2)"/>
>>         </xsl:otherwise>
>>       </xsl:choose>
>>       <xsl:if test="string-length($str) &gt; 1">
>>         <xsl:call-template name="encode-url">
>>           <xsl:with-param name="str" select="substring($str,2)"/>
>>         </xsl:call-template>
>>       </xsl:if>
>>     </xsl:if>
>>   </xsl:template>
>>
>>
>> Thanks in advance
>>
>> Cheers
>> Trevor
>
>



--
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/

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