Скачать или смотреть How to Accurately Count Text Elements in XSLT per Page and their Position

Learn how to effectively count text elements in XSLT based on their position within a hierarchical XML structure and page.
---
This video is based on the question https://stackoverflow.com/q/77274869/ asked by the user 'CrazyEight' ( https://stackoverflow.com/u/8428634/ ) and on the answer https://stackoverflow.com/a/77274937/ provided by the user 'michael.hor257k' ( https://stackoverflow.com/u/3016153/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: XSLT - Count preceding within ancestor

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding XSLT: Counting Text Elements Within Pages

When working with XML data, particularly in complex structures involving multiple nodes, it can be challenging to extract specific information, such as the count of elements. In this guide, we'll tackle the problem of counting text elements within pages using XSLT. Specifically, we will learn how to know the page number and the position of these text elements within their respective pages.

The XML Structure

Before diving into the solution, let’s examine the XML structure we are working with:

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

In this structure, we have multiple pages, each containing several viewports that in turn hold text elements. Our goal is to determine, for any given text, which page it resides in and its position among other text elements within that same page.

The Challenge

To illustrate, consider the text element page2 text8. We want to find out that:

Page Number: 2 (indicating that it is on the second page)

Position in Page: 8 (indicating that it's the eighth text element overall on that page)

The issue arises when trying to compute position-in-page, as the traditional preceding:: axis does not yield the desired result. We need to incorporate a mixture of preceding-sibling and ancestor to achieve this.

The Solution

To effectively count elements, we can utilize the xsl:number element within our XSLT template. Let’s break it down step-by-step.

Step 1: Counting the Page Number

To count the page number of the current text element, we can use the following line within our <xsl:template>:

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

This statement effectively counts the number of page elements that precede the current text, allowing us to accurately determine the page number.

Step 2: Counting the Position in Page

Next, for determining the position of the text element within its own page, we can utilize:

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

This command counts the number of text elements that have the same parent page, thus enabling us to find the position of our current text element within that specific page.

Full Template Example

Here’s how your complete XSLT template could look like:

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

This template ensures you have both the page number and the position in page correctly identified for each text element.

Conclusion

Navigating through XML structures can sometimes be cumbersome, especially when counting elements in a hierarchical relationship. However, by using XSLT's built-in functions xsl:number, you can elegantly extract the required information. The methods detailed in this post allow for efficient counting of text elements both globally (page number) and locally (position in page), enriching your ability to manipulate and utilize XML data efficiently.

Now you should be equipped to handle this challenge in your XML/XSLT projects! Happy coding!