XSLT Copy-Of Tutorial 🎯

Welcome to the XSLT Copy-Of tutorial! In this lesson, we'll dive into one of the most useful XSLT functions: copy-of. By the end of this tutorial, you'll be able to copy and manipulate XML data effectively. Let's get started!

What is XSLT Copy-Of? 📝

The copy-of function in XSLT is used to create a deep copy of an XML node or a subtree. It allows us to duplicate parts of an XML document without modifying the original data.

Why Use Copy-Of? 💡

The copy-of function is essential when you need to create multiple versions of an XML document, perform complex transformations, or maintain the original data integrity while making changes to a copy.

Basic Syntax of Copy-Of 📝

The basic syntax of the copy-of function is as follows:

xml

<xsl:copy-of select="node()"/>

Replace node() with the path to the XML node or subtree you want to copy.

Example 1: Copying an Entire XML Document 🎯

Let's start with a simple example. In this case, we'll copy an entire XML document using the copy-of function.

xml

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" encoding="UTF-8" indent="yes"/>

  <xsl:template match="/">
    <copy>
      <xsl:copy-of select="*"/>
    </copy>
  </xsl:template>
</xsl:stylesheet>

<books>
  <book id="1">
    <title>XML for Dummies</title>
    <author>Joe Public</author>
  </book>
  <book id="2">
    <title>The Art of XSLT</title>
    <author>John Doe</author>
  </book>
</books>

When you apply the XSLT stylesheet to the XML data, the output will be:

xml

<copy>
  <books>
    <book id="1">
      <title>XML for Dummies</title>
      <author>Joe Public</author>
    </book>
    <book id="2">
      <title>The Art of XSLT</title>
      <author>John Doe</author>
    </book>
  </books>
</copy>

Example 2: Copying a Specific Subtree 🎯

Now, let's copy a specific subtree within an XML document. In this case, we'll copy all the book elements and their contents.

xml

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" encoding="UTF-8" indent="yes"/>

  <xsl:template match="/books">
    <copiedBooks>
      <xsl:copy-of select="book"/>
    </copiedBooks>
  </xsl:template>
</xsl:stylesheet>

<books>
  <book id="1">
    <title>XML for Dummies</title>
    <author>Joe Public</author>
  </book>
  <book id="2">
    <title>The Art of XSLT</title>
    <author>John Doe</author>
  </book>
</books>

The output will be:

xml

<copiedBooks>
  <book id="1">
    <title>XML for Dummies</title>
    <author>Joe Public</author>
  </book>
  <book id="2">
    <title>The Art of XSLT</title>
    <author>John Doe</author>
  </book>
</copiedBooks>

Quiz 🎯

With these examples, you now have a solid understanding of the XSLT copy-of function. Practice using it in your own projects, and you'll soon master this powerful tool for manipulating XML data! 💡

Stay tuned for more XSLT tutorials at CodeYourCraft! 🚀