Cleanup-RTF.xslt

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" xmlns:xhtml="http://www.w3.org/1999/xhtml" exclude-result-prefixes="xhtml">

    <xsl:output omit-xml-declaration="yes" method="xml" cdata-section-elements="script"></xsl:output>
    
    <xsl:template match="/ | node() | @*">
        <xsl:copy >
            <xsl:apply-templates select="node() | @*"></xsl:apply-templates>
        </xsl:copy>
    </xsl:template>

    <xsl:template match="*[      (self::br or self::p or self::div)     and      normalize-space(translate(., &apos; &apos;, &apos;&apos;)) = &apos;&apos;     and      not(@*)     and      not(processing-instruction())     and      not(comment())     and      not(*[not(self::br) or @* or * or node()])     and      not(following::node()[not(         (self::text() or self::br or self::p or self::div)        and         normalize-space(translate(., &apos; &apos;, &apos;&apos;)) = &apos;&apos;        and         not(@*)        and         not(processing-instruction())        and         not(comment())        and         not(*[not(self::br) or @* or * or node()])       )])     ]">
        <!-- ignore all paragraphs and line-breaks at the end that have nothing but (non-breaking) spaces and line breaks -->
    </xsl:template>
    
    <xsl:template match="br[parent::div and not(preceding-sibling::node()) and not(following-sibling::node())]">
        <!-- Chrome generates <div><br/></div>. Renders differently in different browsers. Replace it with a non-breaking space -->
        <xsl:text> </xsl:text>
    </xsl:template>

    <!-- remove disallowed attributes -->
    <xsl:template match="@align | @valign | @border | @cellpadding | @cellspacing | @style | @colspan | @rowspan | @class"></xsl:template>

    <!-- added bold to strong conversion -->
    <xsl:template match="xhtml:string | b">
        <xsl:element name="strong">
            <xsl:apply-templates select="node()"></xsl:apply-templates>
        </xsl:element>
    </xsl:template>
    
    <!-- added italic to em converter -->
    <xsl:template match="xhtml:i | i">
        <xsl:element name="em">
            <xsl:apply-templates select="node()"></xsl:apply-templates>
        </xsl:element>
    </xsl:template>

    <!-- added italic to em converter -->
    <xsl:template match="xhtml:span | span | xhtml:div | div">
        <xsl:element name="p">
            <xsl:apply-templates select="node()"></xsl:apply-templates>
        </xsl:element>
    </xsl:template>

    <!-- Remove but keep contents -->
    <xsl:template match="ol | li">
        <xsl:apply-templates/>
    </xsl:template> 

    <!-- Remove  -->
    <xsl:template match="ol | li">
    </xsl:template> 
 
</xsl:stylesheet>