using xsl:for-each-group

痞子三分冷 提交于 2019-12-06 16:30:25

Here is my adaption of the previously posted stylesheet, it simply does an additional group-starting-with before calling the recursive function grouping the levels. I realize that is kind of the same suggestion as in an earlier post you made but so far it is not clear to me why that suggestion does not work for you.

So here is the stylesheet:

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:mf="http://example.com/mf"
  exclude-result-prefixes="xs mf">

<xsl:param name="prefix" as="xs:string" select="'h'"/>
<xsl:param name="suffix" as="xs:string" select="'-title'"/>

<xsl:output method="xml" version="1.0" indent="yes"/>

<xsl:function name="mf:group" as="node()*">
  <xsl:param name="items" as="node()*"/>
  <xsl:param name="level" as="xs:integer"/>
  <xsl:for-each-group select="$items" group-starting-with="p[@name = concat($prefix, $level, $suffix)]">
    <xsl:choose>
      <xsl:when test="not(self::p[@name = concat($prefix, $level, $suffix)])">
        <xsl:apply-templates select="current-group()"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:element name="h{$level}">
          <xsl:apply-templates select="."/>
          <xsl:sequence select="mf:group(current-group() except ., $level + 1)"/>
        </xsl:element>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each-group>
</xsl:function>

<xsl:template match="@* | node()">
  <xsl:copy>
    <xsl:apply-templates select="@* , node()"/>
  </xsl:copy>
</xsl:template>

<xsl:template match="body">
  <xsl:copy>
    <xsl:for-each-group select="*" group-starting-with="p[@name = 'section-title' or @name = 'summary-title']">
      <xsl:choose>
        <xsl:when test="not(self::p[@name = 'section-title' or @name = 'summary-title'])">
          <xsl:apply-templates select="current-group()"/>
        </xsl:when>
        <xsl:otherwise>
          <body-contents>
             <xsl:sequence select="mf:group(current-group(), 1)"/>
          </body-contents>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:for-each-group>
  </xsl:copy>
</xsl:template>

</xsl:stylesheet>

When I apply that stylesheet with Saxon 9.4 to the corrected input

<body>
       <p name="h-title" other="main">Introduction</p>
       <p name="h-titledesc " other="other-desc">XSLT and XQuery</p>


       <p name=""> XSLT is used to write stylesheets.</p>
    <p name="section-title" other=" other-section">XSLT</p>
    <p name="section-desc" other=" other-sectionsdesc">XSLT</p>
    <p name=""> Some text.</p>
    <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>
    <p name="h1-title" other=" other-h1">XSLT</p>
    <p name=""> Some text.</p>
       <p name="h2-title" other="other-h2">XQuery</p>
       <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>
       <p name="h3-title" other="other-h3">XQuery and stylesheets</p>
       <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>


    <p name="section-title" other=" other-section">XSLT</p>
    <p name="section-desc" other=" other-sectionsdesc">XSLT</p>
    <p name=""> Some text.</p>
    <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>
    <p name="h1-title" other=" other-h1">XSLT</p>
    <p name=""> Some text.</p>
       <p name="h2-title" other="other-h2">XQuery</p>
       <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>
       <p name="h3-title" other="other-h3">XQuery and stylesheets</p>
       <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>


       <p name ="summary-title">this is summary</p>
       <p name="summary-desc " other="other-summarydesc">the summary</p>
    </body>

I get the output

<body>
   <p name="h-title" other="main">Introduction</p>
   <p name="h-titledesc " other="other-desc">XSLT and XQuery</p>
   <p name=""> XSLT is used to write stylesheets.</p>
   <body-contents>
      <p name="section-title" other=" other-section">XSLT</p>
      <p name="section-desc" other=" other-sectionsdesc">XSLT</p>
      <p name=""> Some text.</p>
      <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>
      <h1>
         <p name="h1-title" other=" other-h1">XSLT</p>
         <p name=""> Some text.</p>
         <h2>
            <p name="h2-title" other="other-h2">XQuery</p>
            <p name="">
               <p1 name="bold"> XQuery is used to query XML databases.</p1>
            </p>
            <h3>
               <p name="h3-title" other="other-h3">XQuery and stylesheets</p>
               <p name="">
                  <p1 name="bold"> XQuery is used to query XML databases.</p1>
               </p>
            </h3>
         </h2>
      </h1>
   </body-contents>
   <body-contents>
      <p name="section-title" other=" other-section">XSLT</p>
      <p name="section-desc" other=" other-sectionsdesc">XSLT</p>
      <p name=""> Some text.</p>
      <p name="">
          <p1 name="bold"> XQuery is used to query XML databases.</p1>
       </p>
      <h1>
         <p name="h1-title" other=" other-h1">XSLT</p>
         <p name=""> Some text.</p>
         <h2>
            <p name="h2-title" other="other-h2">XQuery</p>
            <p name="">
               <p1 name="bold"> XQuery is used to query XML databases.</p1>
            </p>
            <h3>
               <p name="h3-title" other="other-h3">XQuery and stylesheets</p>
               <p name="">
                  <p1 name="bold"> XQuery is used to query XML databases.</p1>
               </p>
            </h3>
         </h2>
      </h1>
   </body-contents>
   <body-contents>
      <p name="summary-title">this is summary</p>
      <p name="summary-desc " other="other-summarydesc">the summary</p>
   </body-contents>
</body>

Please next time when you provide an input sample make sure it is well-formed, so far you have always posted stuff like <p name="h2-title " name="other-h2">XQuery</p>, and two attributes of the same name are not possible.

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