Re: [xsl] global language parameter

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2010-02-14 01:41 +0900, Charles Muller wrote:
> I'm taking my first stab at making a global parameter, through which 
> I'd like to set font attributes for character sets of different 
> languages. I'm using TEI-P5 with XSL 2, and I want my parameter to 
> work with xml:lang.

In XSLT-speak a "global parameter" is a parameterized global 
variable.  In your example code I see no references to any 
parameterized global variables.

> It tried writing this way:
>
> <xsl:template name="languageWrap">
>    <xsl:param name="contents">
>      <xsl:apply-templates/>
>    </xsl:param>
>    <xsl:choose>
>      <xsl:when test="@xml:lang='sa'">
>        <span style="font-family: 'Times Ext Roman'">
>          <xsl:copy-of select="$contents"/>
>        </span>
>      </xsl:when>
>     <xsl:when test="@xml:lang='zh'">
>        <span style="font-family: Mincho,MingLiU, Batang, Simsun">
>          <xsl:copy-of select="$contents"/>
>        </span>
>      </xsl:when>
>     <xsl:when test="@xml:lang='ko'">
>        <span style="font-family: Batang, BatangChe">
>          <xsl:copy-of select="$contents"/>
>        </span>
>      </xsl:when>
>      <xsl:otherwise>
>        <xsl:copy-of select="$contents"/>
>      </xsl:otherwise>
>    </xsl:choose>
> </xsl:template>
>
>
> But nothing happens in the generated HTML--there are no <span> tags 
> generated at all in the document. Any suggestions as to what I 
> should be looking for here?

You don't give us your input stream with an example ... you just have 
a named template, so there isn't even a match= attribute to determine 
where you are testing this.

And I'm unclear why you are using a local variable for the processed 
contents ... though a smart XSLT processor would probably optimize it away.

Note, however, that the direct addressing of the xml:lang= attribute 
is not good form because of the language scope.  This is expressly 
handled in XPath 1 and XPath 2 using the lang() function.  In your 
code above I would have considered something along the lines of:

   <xsl:choose>
     <xsl:when test="lang('sa')">
       <span style="font-family: 'Times Ext Roman'">
         <xsl:apply-templates/>
       </span>
     </xsl:when>
    <xsl:when test="lang('zh')">
       <span style="font-family: Mincho,MingLiU, Batang, Simsun">
         <xsl:apply-templates/>
       </span>
     </xsl:when>
    <xsl:when test="lang('ko')">
       <span style="font-family: Batang, BatangChe">
         <xsl:apply-templates/>
       </span>
     </xsl:when>
     <xsl:otherwise>
         <xsl:apply-templates/>
     </xsl:otherwise>
   </xsl:choose>

The lang() function is particularly useful, because it will return 
true for lang('fr') when the closest ancestral xml:lang= declaration 
is xml:lang="fr" or xml:lang="fr-ca" or xml:lang="fr-anything at all here".

I hope this helps.

. . . . . . . . . . . . Ken


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