XSLT transformation b -> bold, i -> italic, text -> normal

xslt_text_attr.groovy

import javax.xml.transform.TransformerFactory
import javax.xml.transform.stream.StreamResult
import javax.xml.transform.stream.StreamSource

def input = '''<?xml version="1.0"?>
<p>This is <b>bold text</b>, <i>italic text</i> and normal text</p>
'''

def xslt = '''<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
  <xsl:output method="xml" indent="yes" encoding="UTF-8"/>
  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="b">
    <c style="bold">
      <xsl:apply-templates/>
    </c>
  </xsl:template>
  <xsl:template match="i">
    <c style="italic">
      <xsl:apply-templates/>
    </c>
  </xsl:template>
  <xsl:template match="text()[not(ancestor::b) and not(ancestor::i)]">
    <c style="normal">
      <xsl:copy/>
    </c>
  </xsl:template>
</xsl:stylesheet>'''

def factory = TransformerFactory.newInstance()
def transformer = factory.newTransformer(new StreamSource(new StringReader(xslt)))
transformer.transform(new StreamSource(new StringReader(input)), new StreamResult(System.out))