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POHow to strip tags context-dependent?
 

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    <p>Suppose I have a source example document like this:</p> <pre><code>&lt;html&gt; &lt;b&gt;&lt;i&gt;&lt;u&gt;TestBIU&lt;/u&gt;&lt;/i&gt;&lt;/b&gt; &lt;i&gt;&lt;b&gt;&lt;u&gt;TestIBU&lt;/u&gt;&lt;/b&gt;&lt;/i&gt; &lt;i&gt;&lt;u&gt;&lt;b&gt;TestIUB&lt;/b&gt;&lt;/u&gt;&lt;/i&gt; &lt;b&gt;&lt;u&gt;&lt;i&gt;TestBUI&lt;/i&gt;&lt;/u&gt;&lt;/b&gt; &lt;u&gt;&lt;i&gt;&lt;b&gt;TestUIB&lt;/b&gt;&lt;/i&gt;&lt;/u&gt; &lt;u&gt;&lt;b&gt;&lt;i&gt;TestUBI&lt;/i&gt;&lt;/b&gt;&lt;/u&gt; &lt;u&gt;TestU&lt;/u&gt; &lt;i&gt;TestI&lt;/i&gt; &lt;b&gt;TestB&lt;/b&gt; &lt;u&gt;&lt;b&gt;TestUB&lt;/b&gt;&lt;/u&gt; &lt;/html&gt; </code></pre> <p>I need a XSLT-Template that produces this:</p> <pre><code>&lt;html&gt; &lt;b&gt;&lt;i&gt;TestBIU&lt;/i&gt;&lt;/b&gt; &lt;i&gt;&lt;b&gt;TestIBU&lt;/b&gt;&lt;/i&gt; &lt;i&gt;&lt;b&gt;TestIUB&lt;/b&gt;&lt;/i&gt; &lt;b&gt;&lt;i&gt;TestBUI&lt;/i&gt;&lt;/b&gt; &lt;i&gt;&lt;b&gt;TestUIB&lt;/b&gt;&lt;/i&gt; &lt;b&gt;&lt;i&gt;TestUBI&lt;/i&gt;&lt;/b&gt; &lt;u&gt;TestU&lt;/u&gt; &lt;i&gt;TestI&lt;/i&gt; &lt;b&gt;TestB&lt;/b&gt; &lt;b&gt;TestUB&lt;/b&gt; &lt;/html&gt; </code></pre> <p>So, it should remove the underline tag when it occurs in combination with italic and/or bold tags. When only underlined, it should remain. Any ideas how to solve this particular problem?</p> <p>Here is my attempt, but if fails for TestUIB and TestUBI:</p> <pre><code>&lt;xsl:template match="/"&gt; &lt;html&gt; &lt;xsl:apply-templates /&gt; &lt;/html&gt; &lt;/xsl:template&gt; &lt;xsl:template match="b/u"&gt; &lt;xsl:apply-templates /&gt; &lt;/xsl:template&gt; &lt;xsl:template match="i/u"&gt; &lt;xsl:apply-templates /&gt; &lt;/xsl:template&gt; &lt;xsl:template match="u/i"&gt; &lt;i&gt;&lt;xsl:apply-templates /&gt;&lt;/i&gt; &lt;/xsl:template&gt; &lt;xsl:template match="u/b"&gt; &lt;b&gt;&lt;xsl:apply-templates /&gt;&lt;/b&gt; &lt;/xsl:template&gt; &lt;xsl:template match="b | u | i"&gt; &lt;xsl:copy&gt; &lt;xsl:apply-templates select="* | text()"/&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; </code></pre>
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