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    <p>This is an XSLT 1.0 solution:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" &gt; &lt;xsl:output method="xml" encoding="utf-8" /&gt; &lt;!-- the identity template copies everything verbatim --&gt; &lt;xsl:template match="node() | @*"&gt; &lt;xsl:copy&gt; &lt;xsl:apply-templates select="node() | @*" /&gt; &lt;/xsl:copy&gt; &lt;/xsl:template&gt; &lt;!-- this matches the first &lt;emph&gt; nodes of their kind in a row --&gt; &lt;xsl:template match="emph[not(@type = preceding-sibling::emph[1]/@type)]"&gt; &lt;xsl:variable name="elementname"&gt; &lt;xsl:choose&gt; &lt;xsl:when test="@type='bold'"&gt;strong&lt;/xsl:when&gt; &lt;xsl:when test="@type='italic'"&gt;em&lt;/xsl:when&gt; &lt;/xsl:choose&gt; &lt;/xsl:variable&gt; &lt;xsl:if test="$elementname != ''"&gt; &lt;!-- the first preceding node with a different type is the group separator --&gt; &lt;xsl:variable name="boundary" select="generate-id(preceding-sibling::emph[@type != current()/@type][1]) " /&gt; &lt;xsl:element name="{$elementname}"&gt; &lt;!-- select all &lt;emph&gt; nodes of the row with the same type... --&gt; &lt;xsl:variable name="merge" select=". | following-sibling::emph[ @type = current()/@type and generate-id(preceding-sibling::emph[@type != current()/@type][1]) = $boundary ]" /&gt; &lt;xsl:apply-templates select="$merge" mode="text" /&gt; &lt;/xsl:element&gt; &lt;/xsl:if&gt; &lt;/xsl:template&gt; &lt;!-- default: keep &lt;emph&gt; nodes out of the identity template mechanism --&gt; &lt;xsl:template match="emph" /&gt; &lt;!-- &lt;emph&gt; nodes get their special treatment here --&gt; &lt;xsl:template match="emph" mode="text"&gt; &lt;!-- effectively, this copies the text node via the identity template --&gt; &lt;xsl:apply-templates /&gt; &lt;!-- copy the first following node - if it is a text node (this is to get interspersed spaces into the output) --&gt; &lt;xsl:if test=" generate-id(following-sibling::node()[1]) = generate-id(following-sibling::text()[1]) "&gt; &lt;xsl:apply-templates select="following-sibling::text()[1]" /&gt; &lt;/xsl:if&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>It results in:</p> <pre><code>&lt;reference&gt; &lt;strong&gt;Antony, R. and Micheal, V.&lt;/strong&gt; &lt;em&gt;reference title&lt;/em&gt; &lt;/reference&gt; </code></pre> <hr> <p>I'm not overly happy with</p> <pre><code>&lt;xsl:variable name="merge" select=". | following-sibling::emph[ @type = current()/@type and generate-id(preceding-sibling::emph[@type != current()/@type][1]) = $boundary ]" /&gt; </code></pre> <p>if someone has a better idea, please tell me.</p>
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