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Copy element copies only the current node without children and attributes, while copy-of copies everything

File: Data.xml <?xml version="1.0" encoding="utf-8"?> <p id="a12">     Compare <B>these constructs</B>. </p> File: Transform.xslt <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet       version="1.0"       xmlns:xsl="http://www.w3.org/1999/XSL/Transform">     <xsl:template match="p">       <DIV>         <B>           <xsl:text>copy-of : </xsl:text>         </B>         <xsl:copy-of select="."/>       </DIV>       <DIV>         <B>           <xsl:text>copy : </xsl:text>         </B>         <xsl:copy/>       </DIV>       <DIV>         <B>           <xsl:text>value-of : </xsl:text>         </B>         <xsl:value-of select="."/>       </DIV>     </xsl:template> </xsl:stylesheet> Output: <?xml version="1.0" encoding="UTF-8"?><DIV><B>copy-of : </B><p id="a12">     Compare <B>these constructs</B>. </p></DIV><DIV><B>copy : </B><p/></DIV><DIV><B>value-of : </B>     Compare these constructs. </DIV>