Скачать или смотреть How to Create an Equivalent Expression in XSLT 2.0 from XSLT 3.0

Discover the key steps to transform your XSLT 3.0 expressions into XSLT 2.0 while maintaining functionality with practical examples.
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This video is based on the question https://stackoverflow.com/q/75231846/ asked by the user 'RamAlx' ( https://stackoverflow.com/u/7334203/ ) and on the answer https://stackoverflow.com/a/75232031/ provided by the user 'Martin Honnen' ( https://stackoverflow.com/u/252228/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Create an Equivalent Expression in XSLT 2.0 from XSLT 3.0

If you're working with XSLT (Extensible Stylesheet Language Transformations), you may encounter situations where you need to downgrade your code from XSLT 3.0 to XSLT 2.0. This can become tricky due to the differences and capabilities that may not exist in the earlier version. Let’s dive into a specific example where a common expression written in XSLT 3.0 leads to issues when run in XSLT 2.0.

The Problem at Hand

You’re using the following XSLT 3.0 template that matches the TratEqnt element:

[[See Video to Reveal this Text or Code Snippet]]

In this expression, the <xsl:copy select=".."> part causes a compiler error when you attempt to run it in an XSLT 2.0 environment. This is a common frustration when transitioning between versions of XSLT because certain features and functions may change or become unavailable.

The Solution: Adapting Your XSLT Code

While it may seem daunting at first, converting your XSLT 3.0 code to its XSLT 2.0 equivalent is absolutely feasible. To address the issue, you will need to modify the line that is causing the error.

Steps to Convert

Here’s how you should change your code:

Replace the Faulty Line:
Instead of using:

[[See Video to Reveal this Text or Code Snippet]]

You should use:

[[See Video to Reveal this Text or Code Snippet]]

Adjust the Copy-of Statement:
Change your copy-of to ensure it still selects the right nodes without referencing Sl:

[[See Video to Reveal this Text or Code Snippet]]

Final Code Example

So your revised template would look like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Transitioning from XSLT 3.0 to XSLT 2.0 does come with its set of challenges, particularly around specific functionalities and expressions that may not translate directly. However, by making small but significant changes, like replacing the <xsl:copy select=".."> statement with <xsl:element> and adjusting the copy-of statements, you can maintain the desired functionality of your XSLT stylesheet.

This adaptation can enhance your ability to work seamlessly across different XSLT versions, ensuring your projects run smoothly without compatibility issues.

If you have more specific scenarios or challenges in XSLT that you’d like to explore, feel free to ask!