Re: finding the parent id of an element in an external

Apart from your problem with the particular functions document(0 and
id() your main problem is that you are writing XPath expressions
as character data of the stykesheet. that _never_ works for
any expression, XPath as used in XSLT always appears in an attribute.



        <xsl:when test="@from">
             <xsl:variable name="dvid">document('../texts/<xsl:value-of select="@doc"/>.xml')//id(@from)/ancestor-or-self::div3[1]/@id</xsl:variable>


So that makes a variable with text nodes containing "document" (and
other stuff) but that is just character data the system will never see
it as an expression to be evaluated.


similarly this is just the characters $divd it does not denote a
reference to the variable unless you put it in an attribute such as 
<xsl:value-of  select="$divid"/>


             $dvid

I think you just want

<xsl:template match="xref">
   <i><a target="new">
     <xsl:attribute name="href">
       <xsl:text>http://localhost:8080/saxon/servlet/SaxonServlet?source=</xsl:text>
       <xsl:value-of select="@doc"/>.xml&#038;style=dynaxml.xsl<xsl:text>&#038;chunk.id=</xsl:text>
       <xsl:choose>
          <xsl:when test="@from">
              <xsl:variable name="from" select="@from"/>
             <xsl:for-each select="document(concat(../texts/@doc,'.xml'))">
              <xsl:value-of select="id($from)/ancestor-or-self::div3[1]/@id"/>
             </xsl:for-each>
          </xsl:when>
          <xsl:otherwise>
                <!-- ... -->
          </xsl:otherwise>
       </xsl:choose>
     </xsl:attribute>
     <xsl:apply-templates/>
   </a></i>
</xsl:template>

howeverthis assumes that both your documents have a <!DOCTYPE that
specifies that the attributes are of type ID otherwise id() will never
find anything.

You may be better to use keys.

David

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