Re: [xsl] Algorithm for setting a variable number of attributes

["Steven D. Majewski steve.majewski@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Not a direct answer to this question, but I was just thinking, while going
thru the Invisible XML https://invisiblexml.org intro and tutorial that it
would sure be handy if the parser was a callable function from XSLT or XQuery
b writing a grammar for things like human written variations of dates would
be nicer to deal with than regex code. There are XQuery and XSLT
implementations, so maybe itbs doable.

b Steve M.


> On Aug 2, 2022, at 2:50 PM, Martin Honnen martin.honnen@xxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>
> On 02.08.2022 19:47, rick@xxxxxxxxxxxxxx <mailto:rick@xxxxxxxxxxxxxx>
wrote:
>> Hello All,
>>
>> I have this as my input:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <root>
>>     <subtask>SUBTASK 25-31-04-714-080 - (20130315)</subtask>
>> </root>
>>
>> And this is my desired output:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <root>
>>     <subtask chapnbr="25" sectnbr="31" subnbr="04" func="714" seq="080"
revdate="20130315"/>
>> </root>
>>
>> I am using a function to parse the input and get it down to a tokenized
sequence. Sometimes the input may not have all of the same positions of data;
for example, it may be:
>>
>> <subtask>SUBTASK 25-31-04</subtask>
>>
>> I can use a series of <xsl:if> statements to add the appropriate attribute
values based on count($attributes), but that makes the <xsl:template
match=bsubtaskb> a bit busy. I am wondering if there is a better way to do
this. For example, can I add the attributes to the element inside my function?
Here is my XSLT. Thank you.
>>
>
> You can use xsl:if or xsl:choose/xsl:when of course inside of the function
itself, as well as XPath
>
>   if (expression) then expression else expression
>
> instead.
>
> It is not clear which values can be missing and how you want to complete
them.
>
> As for other approaches, there is xsl:analyze-string and in XSLT 3/XPath 3.1
there is also the XPath analyze-string function you could try with a pattern
for the various groups of digits you expect, push the result through a mode
that adds the default data for missing groups and push through another mode
perhaps that outputs the attribute nodes.
>
>
>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
<http://www.w3.org/1999/XSL/Transform>
>>     xmlns:xs="http://www.w3.org/2001/XMLSchema";
<http://www.w3.org/2001/XMLSchema>
>>     xmlns:math="http://www.w3.org/2005/xpath-functions/math";
<http://www.w3.org/2005/xpath-functions/math>
>>     xmlns:rq="http://www.frameexpert.com/functions";
<http://www.frameexpert.com/functions>
>>     exclude-result-prefixes="xs math rq"
>>     version="3.0" expand-text="yes">
>>
>>     <xsl:output indent="yes"/>
>>
>>     <xsl:template match="/">
>>         <root>
>>             <xsl:apply-templates/>
>>         </root>
>>     </xsl:template>
>>
>>     <xsl:template match="subtask">
>>         <xsl:copy>
>>             <xsl:variable name="attributes"
select="rq:getSubtaskAttributes(.)"/>
>>             <xsl:message>{$attributes}</xsl:message>
>>         </xsl:copy>
>>     </xsl:template>
>>
>>     <xsl:function name="rq:getSubtaskAttributes">
>>         <xsl:param name="context"/>
>>         <xsl:variable name="variable1"
select="replace($context,'[^-\d]+','')"/>
>>         <xsl:sequence select="tokenize($variable1,'-')"/>
>>     </xsl:function>
>>
>> </xsl:stylesheet>
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