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Learn how to dynamically restructure XML data from FMPXMLRESULT format using `XSLT 1.0`. This guide provides step-by-step guidance on grouping and organizing XML data based on metadata.
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Transforming XML Data with Dynamic Grouping Using XSLT 1.0

As development projects often require data transformation, working with XML is a common scenario. In this post, we will explore how to dynamically transform XML data from the FMPXMLRESULT format to another structured format using XSLT 1.0. The challenge lies in restructuring the XML based on the metadata within the source, while the output must adapt flexibly to changes in input data structure.

Understanding the Problem

The Source XML Structure

Your starting point is an XML file structured with metadata for fields and a result set containing data. Here’s an overview of the XML structure we'll be working with:

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The XML output must transform into a format where each order and its respective items are grouped properly. The distinction comes from how we're grouping data, especially elements that may contain related fields, denoted by ::. In our target structure, we want something like this:

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Key Challenges

Dynamic Grouping: Organizing data fields dynamically based on their metadata while retaining flexibility in naming conventions and grouping behaviors.

Data Extraction: Pulling data from specified positions within COL nodes and assigning them correctly to their respective groups.

Implementing the Solution with XSLT

To accomplish this transformation, we need to write an XSLT 1.0 stylesheet that manages these challenges effectively. Below is a breakdown of how to build this stylesheet.

Step 1: Define the XSLT Structure

Start your XSLT document with essential namespaces and output settings:

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Step 2: Extract Metadata

Utilize XSLT to create a list of field elements based on the original metadata. This is necessary for mapping data fields to their corresponding nodes correctly:

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Step 3: Template for Orders

Next, match the ROW elements and create corresponding Order elements. You'll loop over unique parent elements derived from the metadata.

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Step 4: Final Transformation Steps

Finish the template by including the necessary transformations for grouped data fields and maintaining a clean output.

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Conclusion

The above guide provides a foundational approach to transforming XML data dynamically with XSLT 1.0 based on metadata. By carefully defining your templates and nesting your loops, you can achieve a flexible output that respects the original data structure while allowing for dynamic changes.

Feel free to adjust and test this XSLT as you encounter different XML formats, ensuring that your transformations remain robust against various input conditions.

If you have any questions or need further assistance with XSLT transformations, don’t hesitate to reach out!