Group specific elements in tables with xslt 1.0 - xslt

Question

I am trying to transform the following code into 3 tables:
<bold>Hello</bold>
<bold>world</bold>
<p>Hello world!</p>
<bold>Please</bold>
<bold>help</bold>
<bold>me</bold>
<p>Please help me.</p>
<h1>This community is great<h1>
<bold>Thank</bold>
<bold>you</bold>
<bold>very</bold>
<bold>much</bold>
The final result should look like this:
<table>
<th>NewHeader1<th>
<tr>
<td>Hello</td>
<td>world</td>
</tr>
</table>
<p>Hello world!</p>
<table>
<th>NewHeader2<th>
<tr>
<td>Please</td>
<td>help</td>
<td>me</td>
</tr>
</table>
<p>Please help me.</p>
<h1>This community is great.<h1>
<table>
<th>NewHeader3<th>
<tr>
<td>Thank</td>
<td>you</td>
<td>very</td>
<td>much</td>
</tr>
</table>
Unfortunately, I achieve only to put all the bold-elements in a single table. Thanks for your help!

Answer 1

Given a well-formed XML input such as:
XML
<root>
<bold>Hello</bold>
<bold>world</bold>
<p>Hello world!</p>
<bold>Please</bold>
<bold>help</bold>
<bold>me</bold>
<p>Please help me.</p>
<h1>This community is great</h1>
<bold>Thank</bold>
<bold>you</bold>
<bold>very</bold>
<bold>much</bold>
</root>
you could use a technique known as sibling recursion:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="bold">
<table>
<th>
<xsl:text>NewHeader</xsl:text>
<xsl:number count="bold[not(preceding-sibling::*[1][self::bold])]"/>
</th>
<tr>
<xsl:apply-templates select="." mode="cell"/>
</tr>
</table>
</xsl:template>
<xsl:template match="bold" mode="cell">
<td>
<xsl:value-of select="."/>
</td>
<!-- sibling recursion -->
<xsl:apply-templates select="following-sibling::*[1][self::bold]" mode="cell"/>
</xsl:template>
<xsl:template match="bold[preceding-sibling::*[1][self::bold]]"/>
</xsl:stylesheet>
to produce:
Result
<?xml version="1.0" encoding="UTF-8"?>
<root>
<table>
<th>NewHeader1</th>
<tr>
<td>Hello</td>
<td>world</td>
</tr>
</table>
<p>Hello world!</p>
<table>
<th>NewHeader2</th>
<tr>
<td>Please</td>
<td>help</td>
<td>me</td>
</tr>
</table>
<p>Please help me.</p>
<h1>This community is great</h1>
<table>
<th>NewHeader3</th>
<tr>
<td>Thank</td>
<td>you</td>
<td>very</td>
<td>much</td>
</tr>
</table>
</root>