Problem with a for-each in xsl:variable

Hi,

I need to split up value ranges like "14-24" with the help of an xslt 
stylesheet. The difficulty doing this task is, that these ranges can also look 
like "13 13a 13b 14 15 15a 16..."

I can just find out the exact items of this range by parsing the doc tree.

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="split_ranges.xslt"?>
<norm id="abgb" xmlns="http://myNamespace/schema/norm";>
        <normtext>
                <stichworte>
                        <stichwort xmlns="">
                                <term>Abgerissenes Land</term>
                                <nummer>412-419</nummer>
                        </stichwort>
                        <stichwort xmlns="">
                                <term>Abhandlung der Erbschaft</term>
                                <nummer>797-824</nummer>
                        </stichwort>
                <stichworte>
                <sektion id="N11990">
                        <titel>Kundmachung des allgemeinen bürgerlichen 
Gesetzbuches</titel>
                        <jur_block id="N11994">
                                <zaehlung zaehlungsart="Paragraf">412</zaehlung>
                                <absatz>Aus der Betrachtung</absatz>
                        </jur_block>
                        <jur_block id="N11998">
                                <zaehlung 
zaehlungsart="Paragraf">412a</zaehlung>
                                <absatz>Der während Unserer Regierung </absatz>
                        </jur_block>
                        <jur_block id="N1199C">
                                <zaehlung 
zaehlungsart="Paragraf">412b</zaehlung>
                                <absatz>Nachdem auf solche Art</absatz>
                        </jur_block>
                        <jur_block id="N119A0">
                                <zaehlung zaehlungsart="Paragraf">413</zaehlung>
                                <absatz>Dadurch wird das bis jetzt an</absatz>
                        </jur_block>
        ...


I tried this stylesheet:


<?xml version="1.0" encoding="UTF-8"?>
<!-- 
Creator:        Huditsch Roman, Mag.(FH) 
Date:           2004-10-14
Version:        00.90
Changes to prior version: - 
Description: This XSLT Stylesheet is intended to splitt all value ranges within 
<nummer> elements
-->
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
xmlns:ln="http://www.lexisnexis.at/schema/norm"; exclude-result-prefixes="ln 
common" xmlns:common="http://exslt.org/common";>
        <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
        <!-- Every node within the source document is copied to the result file 
-->
        <xsl:template match="node()| @*">
                <xsl:copy>
                        <xsl:apply-templates select="@* | node()"/>
                </xsl:copy>
        </xsl:template>
        <xsl:template match="nummer[contains(., '-')]">
                <xsl:param name="n" select="number(substring-after(. , '-') - 
substring-before(. , '-'))"/>
                <xsl:variable name="start" select="substring-before(. , '-')"/>
                <xsl:variable name="end" select="substring-after(. , '-')"/>
                <xsl:variable name="sum" select="$n + $start"/>
                <!-- This variable should contain <lit>a</lit><lit>b</lit>.. -->
                <xsl:variable name="lit">
                        <xsl:for-each 
select="//ln:jur_block[preceding-sibling::ln:jur_block[. 
=$sum]]/ln:zaehlung[(_at_)zaehlungsart='Paragraf' and contains(., $sum)]">
                                <xsl:if test="number(substring-after(. , 
$sum))='NaN'">
                                        <lit>
                                                <xsl:value-of select="."/>
                                        </lit>
                                </xsl:if>
                        </xsl:for-each>
                </xsl:variable>
                <nummer>
                        <xsl:value-of select="$start + $n"/>
                </nummer>
                <xsl:for-each select="common:node-set($lit)/*">
                        <nummer>
                                <xsl:value-of select="$start + $n"/>
                                <xsl:value-of select="."/>
                        </nummer>
                </xsl:for-each>
                <xsl:if test="$n >= 1">
                        <xsl:apply-templates select=".">
                                <xsl:with-param name="n" select="$n - 1"/>
                        </xsl:apply-templates>
                </xsl:if>
        </xsl:template>
</xsl:stylesheet>

I suppose there is a problem with my for-each, since all works fine, when I 
fill my variable manually with <lit>a</lit><lit>b</lit>


But unfortunately it doesn't work out...
My instant saxon 6.5.2 is transforming and transforming and transforming...

How can I solve this problem?

Thank you very much for your help!

Wbr,
Roman


_______________________________________

Mag.(FH) Roman Huditsch
IT und Electronic Publishing
LexisNexis Verlag ARD ORAC GmbH & Co KG
Marxergasse 25
A-1030 Wien
Tel. +43-1-534 52-1514, Fax +43-1-534 52-148
roman(_dot_)huditsch(_at_)lexisnexis(_dot_)at 


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