Re: [xsl] max string-length for context grandchildren

<xsl:variable name="longest-label"
select="max(string-length(deflist/label))"/>

seems to have a typo: "deflist" which makes for the zero result.
Might not be the only problem as compared to solutions of the others.

Michel

On Wed, Oct 5, 2011 at 7:23 AM, Dimitre Novatchev <dnovatchev@xxxxxxxxx>
wrote:
>> I'm trying to determine which of the three <label> elements
>> is the longest, so my desired output is: 14, which is the string
>>length of list/defitem/label[2].  The calculation needs to be made
>> while <list> is the context node
>
> Use:
>
> max(defitem/label/string-length())
>
> The result is: 14
>
>
>
>
>
> --
> Cheers,
> Dimitre Novatchev
> ---------------------------------------
> Truly great madness cannot be achieved without significant intelligence.
> ---------------------------------------
> To invent, you need a good imagination and a pile of junk
> -------------------------------------
> Never fight an inanimate object
> -------------------------------------
> You've achieved success in your field when you don't know whether what
> you're doing is work or play
> -------------------------------------
> Facts do not cease to exist because they are ignored.
> -------------------------------------
> I finally figured out the only reason to be alive is to enjoy it.
>
>
>
>
> On Tue, Oct 4, 2011 at 7:08 PM, Eric Harbeson
> <kiteeatingtree@xxxxxxxxxxxxx> wrote:
>> Dear all,
>>
>> I am trying to determine the length of the longest string of a given
element, which is the grand-child of the context node.  I've looked all over
the archives and haven't found anything that I can get to work (possibly an
indictment of my searching skills).  So I'm hoping a kind soul will take pity
and help me.
>>
>> Details first: I'm using XSLT 2.0, though a 1.0 solution would be fine too.
 I've tried processing using Saxon [PE | HE | EE] 9.3.0.5, as contained in
oXygen 12.2.
>>
>>
>> I have the following XML:
>>
>> <record>
>>    <list type="deflist">
>>        <head>This is a test list</head>
>>        <defitem>
>>            <label>Processed by</label>
>>            <item>Lynette Stoudt</item></defitem>
>>        <defitem>
>>            <label>Date Completed</label>
>>            <item>February 1999</item></defitem>
>>        <defitem>
>>            <label>Encoded by</label>
>>            <item>William Landis</item>
>>        </defitem>
>>    </list>
>> </record>
>>
>> I'm trying to determine which of the three <label> elements is the longest,
so my desired output is: 14, which is the string length of
list/defitem/label[2].  The calculation needs to be made while <list> is the
context node.  I've tried two different approaches:
>>
>> 1) It seems to me that it should be possible to do something like this:
>>
>>    <xsl:template match="list">
>>        <template match="list">
>>            <xsl:variable name="longest-label"
select="max(string-length(deflist/label))"/>
>>            <xsl:value-of select="$longest-label"/>
>>        </template>
>>    </xsl:template>
>>
>> ...but this returns the number zero.
>>
>> 2) The closest thing I've found to an answer is the dual parameter solution
recommended by Michael Kay and as implemented by Phil Lanch on the dpawson FAQ
site (http://www.dpawson.co.uk/xsl/sect2/N8090.html#d10874e649 (#16: How to
find the longest node in a node-set)).
>>
>> My implementation of that (which follows) generates the following error,
which I can't explain: "Required item type of first operand of '<' is numeric;
supplied value has item type xs:string."
>>
>>    <xsl:template match="list">
>>        <xsl:variable name="longest-label">
>>            <xsl:call-template name="getlongest">
>>                <xsl:with-param name="nodeset" select="defitem/label"/>
>>                <xsl:with-param name="longest"/>
>>            </xsl:call-template>
>>        </xsl:variable>
>>        <xsl:text>LongestLabel </xsl:text><xsl:value-of
select="$longest-label"></xsl:value-of>
>>    </xsl:template>
>>
>>    <xsl:template name="getlongest">
>>        <xsl:param name="nodeset"/>
>>        <xsl:param name="longest" select="0"/>
>>        <xsl:choose>
>>            <xsl:when test="$nodeset">
>>                <xsl:choose>
>>                    <xsl:when test="string-length($nodeset[1]) > $longest">
>>                        <xsl:call-template name="getlongest">
>>                            <xsl:with-param name="nodeset"
 select="$nodeset[position()  > 1]"/>
>>                            <xsl:with-param name="longest"
select="string-length($nodeset[1])"/>
>>                        </xsl:call-template>
>>                    </xsl:when>
>>                    <xsl:otherwise>
>>                        <xsl:call-template name="getlongest">
>>                            <xsl:with-param name="nodeset"
 select="$nodeset[position()  > 1]"/>
>>                            <xsl:with-param name="longest"
select="$longest"/>
>>                        </xsl:call-template>
>>                    </xsl:otherwise>
>>                </xsl:choose>
>>            </xsl:when>
>>            <xsl:otherwise>
>>                <xsl:value-of select="$longest"/>
>>            </xsl:otherwise>
>>        </xsl:choose>
>>    </xsl:template>
>>
>> I can't actually find the "<" that is at issue here.  When debugging, I
noted that the value of $nodeset is never a number, but some thing like
"<label><label><label>", though I can't see why.
>>
>> Any thoughts would be very appreciated.
>>
>> With thanks in advance,
>> Eric Harbeson
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