RE: [xsl] Inserting global parameter value into xsl:function

["Michael Kay" <mhk@xxxxxxxxx>]

I think you've hit a problem that Saxon is not actually checking the
type of supplied stylesheet parameters against their declaration at the
moment. If you are calling Saxon from the command line, then the
supplied parameter is always a string, regardless of the xsl:param
declaration.

The answer is to declare it as a string, and convert it to an integer
using a casting function:

<xsl:param name="pos-as-string"/>
<xsl:variable name="pos-as-integer"
select="xs:integer($pos-as-string)"/>

Michael Kay


> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Clay Redding
> Sent: 18 June 2003 18:21
> To: XSL-List@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Inserting global parameter value into xsl:function
> 
> 
> Hi list, I am somewhat of an XSL 2.0 newbie, and I have a 
> fairly simple 
> question that doesn't necessarily have anything to do with 2.0, but 
> involves the xsl:function element.
> 
> In my XSL I have defined a function that will take a 
> required, top-level 
> parameter (called 'position'), and then feeds this position into a 
> variable (called 'forward') that calls the function 
> ('forwardURL') with 
> the 'postion' parameter as the value that references the 
> value I need. 
> The function is used to return a URL value from the XML doc.  
> That URL 
> should be available for referencing later in the HTML output 
> through the 
> 'forward' global attribute.
> 
> Whenever I try to invoke the code below, it chokes on data typing 
> issues, saying that it cannot add xs:string to xs:integer.  
> What it is 
> trying to do is take the ($position) reference in the 
> "forward" variable 
> and add it within the function to 1.  But it's treating 
> $position as a 
> string, not as an integer passed on as a value.  How can I reference 
> $position (or any other variable/parameter) within a 
> select/XPath-esque 
> attribute so that it doesn't treat $position as a literal 
> string?  Do I 
> use curly braces, brackets, or what?
> 
> I'm using Saxon 7.5.1 as servlet, with JDK 1.4.1.
> 
> Thanks for any help you can give.
> Clay
> 
> <xsl:stylesheet version="2.0" xmlns:njp="http://...,etc."; 
> xmlns:xs="http://...,etc."; xmlns:mets="http://..., etc.">
> <!-- shortened for brevity -->
> 
> <xsl:param name="position" required="yes" as="xs:integer"/>
> <xsl:variable name="forward" as="xs:string" 
> select="njp:forwardURL($position)"/>
> 
> <xsl:variable name="array">
> <xsl:for-each 
> select="mets:mets/mets:fileSec/mets:fileGrp/mets:file/mets:FLocat">
> <id><xsl:value-of select="@ID"/></id>
> <url><xsl:value-of select="@xlink:href"/></url>
> <position><xsl:value-of select="position() - 1"/></position>
> </xsl:for-each>
> <xsl:for-each select="$dmdSec">
> <dmd><xsl:value-of select="."/></dmd>
> </xsl:for-each>
> </xsl:variable>
> 
> <xsl:function name="njp:forwardURL">
> <xsl:param name="placeholder"/>
> <xsl:sequence select="$array/url[$placeholder + 1]"/>
> </xsl:function>
> ...
> 
> <!-- the following appears within an xsl:template -->
> <img id="mypic" class="border" alt="Page" src="{$forward}"/>
> 
> 
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> 


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