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Re: [xsl] How to do this unique grouping on XML using XSLT 1.0


Subject: Re: [xsl] How to do this unique grouping on XML using XSLT 1.0
From: Amit Agarwal <aagarwal123@xxxxxxxxx>
Date: Tue, 19 Jun 2012 23:06:45 +0530

Hi Scott,

Thanks for the response.

My target xml is little bit different.  Grouping logic that you
mentioned is correct but I'm facing issue to create the target xml.

Input xml:
------------
<Root>
 <Drug>
  <medicinalproduct>BPM Infra</medicinalproduct>
  <ObtainedCountryCode>US</ObtainedCountryCode>
  <DeviceProductCode>1234</DeviceProductCode>
 </Drug>
 <Drug>
  <medicinalproduct>Multistandard VCR</medicinalproduct>
  <ObtainedCountryCode>UK</ObtainedCountryCode>
 </Drug>
 <Drug>
  <medicinalproduct>Pharmaceuticals</medicinalproduct>
  <ObtainedCountryCode>IN</ObtainedCountryCode>
 </Drug>
 <Drug>
  <medicinalproduct>Different Product name</medicinalproduct>
  <DeviceProductCode>456</DeviceProductCode>
 </Drug>
</Root>
-------------

Target Xml:
--------------
<Root>
 <Drug>
  <medicinalproduct>BPM Infra</medicinalproduct>
  <obtaindrugcountry>US</obtaindrugcountry>
  <activesubstancename>1234</activesubstancename>
 </Drug>
 <Drug>
  <medicinalproduct>Multistandard VCR</medicinalproduct>
  <obtaindrugcountry>UK</obtaindrugcountry>
 </Drug>
 <Drug>
  <medicinalproduct>Pharmaceuticals</medicinalproduct>
  <obtaindrugcountry>IN</obtaindrugcountry>
 </Drug>
 <Drug>
  <medicinalproduct>Different Product name</medicinalproduct>
  <activesubstancename>456</activesubstancename>
 </Drug>
</Root>
---

As you can see, my target xml has different tags name. So, instead of copying

<xsl:copy-of select="key('drug',
self::ebo:DrugSafetyReportDrug/ebo:MedicinalProductName |
self::ebo:DrugSafetyReportMedicalDevice/ebo:MedicalDeviceName)/*[not(self::eb
o:MedicinalProductName
or self::ebo:MedicalDeviceName)]"/>

I have to transform it to target elements.

Thanks,
Amit








> On Tue, Jun 19, 2012 at 8:02 PM, Scott Trenda <Scott.Trenda@xxxxxxxx>
wrote:
>> Pretty easy, overall. Mainly you need to remember that you can register
multiple node-set matches under a single key name, and retrieve them all at
the same time through one key() call. This allows you to do Muenchian grouping
over multiple node-sets whose nodes have similar but not identical structure.
After you have the groups, it's just a matter of choosing which element you
retrieve for grouping and for the medicinalproduct node. The self:: axis ends
up being slightly more succinct than a predicate that checks name(). It's
repeated three times here; I don't know if that starts to be a case for
pulling out the string itself into an XML entity. YMMV.
>>
>>
>> <xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
>>  <xsl:output encoding="utf-8" indent="yes" omit-xml-declaration="yes" />
>>  <xsl:key name="drug" match="DrugSafetyReportDrug"
use="MedicinalProductName" />
>>  <xsl:key name="drug" match="DrugSafetyReportMedicalDevice"
use="MedicalDeviceName" />
>>  <xsl:variable name="drugs" select="//DrugSafetyReportDrug |
//DrugSafetyReportMedicalDevice" />
>>  <xsl:template match="/*">
>>    <Root>
>>      <xsl:for-each select="$drugs[generate-id(key('drug',
self::DrugSafetyReportDrug/MedicinalProductName |
self::DrugSafetyReportMedicalDevice/MedicalDeviceName)) = generate-id()]">
>>        <Drug>
>>          <medicinalproduct>
>>            <xsl:value-of
select="self::DrugSafetyReportDrug/MedicinalProductName |
self::DrugSafetyReportMedicalDevice/MedicalDeviceName" />
>>          </medicinalproduct>
>>          <xsl:copy-of select="key('drug',
self::DrugSafetyReportDrug/MedicinalProductName |
self::DrugSafetyReportMedicalDevice/MedicalDeviceName)/*[not(self::MedicinalP
roductName or self::MedicalDeviceName)]" />
>>        </Drug>
>>      </xsl:for-each>
>>    </Root>
>>  </xsl:template>
>> </xsl:stylesheet>
>>
>>
>> XSLT2 would be just slightly more convenient here, with <xsl:for-each-group
select="//DrugSafetyReportDrug | //DrugSafetyReportMedicalDevice"
group-by="self::DrugSafetyReportDrug/MedicinalProductName |
self::DrugSafetyReportMedicalDevice/MedicalDeviceName">, and then using
current-group() instead of calling key() again... but the underlying logic
would stay the same.
>>
>> ~ Scott
>>
>>
>> -----Original Message-----
>> From: Amit Agarwal [mailto:aagarwal123@xxxxxxxxx]
>> Sent: Tuesday, June 19, 2012 8:12 AM
>> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx; xsl-list-help@xxxxxxxxxxxxxxxxxxxxxx
>> Subject: [xsl] How to do this unique grouping on XML using XSLT 1.0
>>
>> My input xml looks like:
>>
>>
>>  Root>
>>  <ReportDrugSafetyReport>
>>   <DrugSafetyReportPatient>
>>    <DrugSafetyReportDrug>
>>     <MedicinalProductName>BPM Infra</MedicinalProductName>
>>     <ObtainedCountryCode>US</ObtainedCountryCode>
>>    </DrugSafetyReportDrug>
>>
>>    <DrugSafetyReportDrug>
>>     <MedicinalProductName>Multistandard VCR</MedicinalProductName>
>>     <ObtainedCountryCode>UK</ObtainedCountryCode>
>>    </DrugSafetyReportDrug>
>>
>>    <DrugSafetyReportDrug>
>>     <MedicinalProductName>Pharmaceuticals</MedicinalProductName>
>>     <ObtainedCountryCode>IN</ObtainedCountryCode>
>>    </DrugSafetyReportDrug>
>>
>>   </DrugSafetyReportPatient>
>>
>>   <DrugSafetyReportMedicalDevice>
>>    <MedicalDeviceName>BPM Infra</MedicalDeviceName>
>>    <DeviceProductCode>1234</DeviceProductCode>
>>   </DrugSafetyReportMedicalDevice>
>>
>>   <DrugSafetyReportMedicalDevice>
>>    <MedicalDeviceName>Different Product name</MedicalDeviceName>
>>    <DeviceProductCode>456</DeviceProductCode>
>>   </DrugSafetyReportMedicalDevice>
>>  </ReportDrugSafetyReport>
>>  </Root>
>>
>>  And My target xml is:
>>
>>  <Root>
>>  <Drug>
>>   <medicinalproduct>BPM Infra</medicinalproduct>
>>   <ObtainedCountryCode>US</ObtainedCountryCode>
>>   <DeviceProductCode>1234</DeviceProductCode>
>>  </Drug>
>>  <Drug>
>>   <medicinalproduct>Multistandard VCR</medicinalproduct>
>>   <ObtainedCountryCode>UK</ObtainedCountryCode>
>>  </Drug>
>>  <Drug>
>>   <medicinalproduct>Pharmaceuticals</medicinalproduct>
>>   <ObtainedCountryCode>IN</ObtainedCountryCode>
>>  </Drug>
>>  <Drug>
>>   <medicinalproduct>Different Product name</medicinalproduct>
>>   <DeviceProductCode>456</DeviceProductCode>
>>  </Drug>
>>  </Root>
>>
>>  Input xml contains two unbounded elements DrugSafetyReportDrug and
DrugSafetyReportMedicalDevice. Both of these elements belongs to different
parent elements, e.g.
>>  <root>ReportDrugSafetyReport/
>> DrugSafetyReportPatient/DrugSafetyReportDrug and
<root>/ReportDrugSafetyReport/DrugSafetyReportMedicalDevice
>>
>>  Each of these elements has a set of child elements. Out of which,
MedicinalProductName is child element of  DrugSafetyReportDrug
>> (DrugSafetyReportDrug/MedicinalProductName)  and MedicalDeviceName is child
element of DrugSafetyReportMedicalDevice
(DrugSafetyReportMedicalDevice/MedicalDeviceName).
>>
>>  Target xml has an unbounded element: drug.
>>
>> If MedicinalProductName = MedicalDeviceName then DrugSafetyReportDrug and
DrugSafetyReportMedicalDevice should be grouped to a single drug element (in
the target xml). Otherwise, there would be a separate drug element for each
DrugSafetyReportDrug and DrugSafetyReportMedicalDevice.
>>
>> Thanks for your help!.
>>
>> Thanks,
>> Amit


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