Group by key in xslt 3.0-CodePudding

I am trying to group by an attribute . Example input:

<?xml version='1.0' encoding='UTF-8'?>
<ns1:map xmlns:ns1="http://www.w3.org/2005/xpath-functions">
  <ns1:string key="omschrijving">Inschrijfstaat Raamovereenkomst</ns1:string>
  <ns1:map key="concepten">
    <ns1:map key="http://url/def/Document">
      <ns1:string key="iri">http://url/def/Document</ns1:string>
      <ns1:string key="naam">Create Document</ns1:string>
    </ns1:map>
  </ns1:map>
  <ns1:map key="collecties">
    <ns1:map key="4a9ff131-a507-4979-817a-09ae4365386a">
      <ns1:string key="uuid">4a9ff131-a507-4979-817a-09ae4365386a</ns1:string>
      <ns1:string key="naam">meeden</ns1:string>
    </ns1:map>
  </ns1:map>
  <ns1:map key="eigenschapConcepten">
    <ns1:map key="http://url/def/4c20ec8e-8e86-30ca-89a0-96e8ecad447d">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">112</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="http://url/def/7d94197f-78b5-3f8f-9068-a99235fda655">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">nld</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="http://url/def/2c0bea42-27b1-35aa-aa93-c91d22a2a78e">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">Inschrijfstaat Raamovereenkomst</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="https://url/43514c35-3699-4cf2-abaa-ac2906c41e7f">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">G014485-BEG-2139</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="http://url/def/hasVersion">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">entiteit</ns1:string>
          <ns1:string key="entiteitUuid">cb020428-ec25-44f7-8add-7e334eb2a3c0</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="https://w3id.org/def/basicsemantics-owl#describes">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">entiteit</ns1:string>
          <ns1:string key="entiteitUuid">004ed20d-1292-4210-a541-755754497fbe</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="https://w3id.org/def/basicsemantics-owl#describes">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">entiteit</ns1:string>
          <ns1:string key="entiteitUuid">004ed20d-1292-4210-a541-755754497fba</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
  </ns1:map>
</ns1:map>

Expected output:

<?xml version='1.0' encoding='UTF-8'?>
<ns1:map xmlns:ns1="http://www.w3.org/2005/xpath-functions">
  <ns1:string key="omschrijving">Inschrijfstaat Raamovereenkomst</ns1:string>
  <ns1:map key="concepten">
    <ns1:map key="http://url/def/Document">
      <ns1:string key="iri">http://data.tennet.eu/def/Document</ns1:string>
      <ns1:string key="naam">Create Document</ns1:string>
    </ns1:map>
  </ns1:map>
  <ns1:map key="collecties">
    <ns1:map key="4a9ff131-a507-4979-817a-09ae4365386a">
      <ns1:string key="uuid">4a9ff131-a507-4979-817a-09ae4365386a</ns1:string>
      <ns1:string key="naam">meeden</ns1:string>
    </ns1:map>
  </ns1:map>
  <ns1:map key="eigenschapConcepten">
    <ns1:map key="http://url/def/4c20ec8e-8e86-30ca-89a0-96e8ecad447d">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">112</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="http://url/def/7d94197f-78b5-3f8f-9068-a99235fda655">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">nld</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="http://url/def/2c0bea42-27b1-35aa-aa93-c91d22a2a78e">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">Inschrijfstaat Raamovereenkomst</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="https://url/43514c35-3699-4cf2-abaa-ac2906c41e7f">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">tekst</ns1:string>
          <ns1:string key="waarde">G014485-BEG-2139</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="http://url/def/hasVersion">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">entiteit</ns1:string>
          <ns1:string key="entiteitUuid">cb020428-ec25-44f7-8add-7e334eb2a3c0</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
    <ns1:map key="https://w3id.org/def/basicsemantics-owl#describes">
      <ns1:array key="eigenschappen">
        <ns1:map>
          <ns1:string key="vullingType">entiteit</ns1:string>
          <ns1:string key="entiteitUuid">004ed20d-1292-4210-a541-755754497fbe</ns1:string>
        </ns1:map>
        <ns1:map>
          <ns1:string key="vullingType">entiteit</ns1:string>
          <ns1:string key="entiteitUuid">004ed20d-1292-4210-a541-755754497fba</ns1:string>
        </ns1:map>
      </ns1:array>
    </ns1:map>
  </ns1:map>
</ns1:map>

See the key "https://w3id.org/def/basicsemantics-owl#describes" is the one i am trying to group, but it can also be another duplicate key. So i can not pinpoint on a hardcoded value for the key.

I have tried a lot off which i found here and other websites but can't seem to make it work dynamically.

Thx for any help in advance.

CodePudding user response：

If the structure is known to contain only those ns1:array children as part of an ns1:map then perhaps

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="3.0"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:fn="http://www.w3.org/2005/xpath-functions"
  exclude-result-prefixes="#all">

  <xsl:output method="xml" indent="yes"/>
  
  <xsl:template match="fn:map[fn:map/fn:array[@key = 'eigenschappen']]">
    <xsl:copy>
      <xsl:apply-templates select="@*"/>
      <xsl:for-each-group select="fn:map" group-by="@key">
        <xsl:copy>
          <xsl:apply-templates select="@*"/>
          <xsl:copy select="fn:array[@key = 'eigenschappen']">
            <xsl:apply-templates select="@*, current-group()/fn:array/*"/>
          </xsl:copy>
        </xsl:copy>
      </xsl:for-each-group>
    </xsl:copy>
  </xsl:template>

  <xsl:mode on-no-match="shallow-copy"/>

</xsl:stylesheet>

suffices.

CodePudding user response：

This works like a charm. I know a bit of xslt but I would have never come up with this. Thank you Martin Honnen