New Functionality In Microsoft Dynamics 365 Business Central 2025 Wave 1: Read and Write YAML in AL Using JsonObject

This post is part of the New Functionality In Microsoft Dynamics 365 Business Central 2025 Wave 1 series in which I am taking a look at the new functionality introduced in Microsoft Dynamics 365 Business Central 2025 Wave 1.

The 9th of the new functionality in the Development section is read and write YAML in AL using JsonObject.

When using data-driven testing, especially for testing Copilot features, there can be a need to read YAML test data. Rather than building an entirely new YAML object model, the existing JSON support is extended so that YAML can be read into the JsonObject, manipulated as JSON with the JsonObject API, and possibly written out again as YAML.

Enabled for: Admins, makers, marketers, or analysts, automatically
Public Preview: Apr 2025
General Availability: Apr 2025

Feature Details

The existing JsonObject is extended so that YAML can be read into the JsonObject, manipulated as JSON with the JsonObject API, and possibly written out again as YAML.

Two new methods are added to read YAML into a JsonObject instance:

[Ok :=] ReadFromYaml(String)
[Ok :=] ReadFromYaml(InStream)

Two new methods are added to write a JsonObject instance as YAML:

[Ok :=] WriteToYaml(String)
[Ok :=] WriteToYaml(OutStream)