
During a two-month period, Jan Petrak contributed to the UnionInternationalCheminsdeFer/OSDM repository by delivering a comprehensive release changelog and implementing targeted API deprecations. He authored detailed documentation in Markdown and YAML, outlining new endpoints, object changes, and deprecations to support release readiness and integration planning. Jan also simplified the OSDM API data model by deprecating the numberOfResults parameter and removing the direction field, aligning the API with upcoming OJP requirements. His work focused on API design, specification, and deprecation management, ensuring forward compatibility and reducing client integration complexity through clear, Git-driven change management and cross-team coordination.

July 2025: Delivered OSDM API deprecations and data model simplification to align with the upcoming OJP migration. Deprecated the numberOfResults parameter in TripParameters and removed the direction field from Trip to simplify the data model and reduce client data-entry burden. These changes position the API for smoother evolution and lower maintenance costs, with minimal client disruption. Commits implementing the changes include 65c3ef334975ae48e7b388fc0c6db039f83cebad (#1082) and 4f004559a17a002dee528c0df7762973c86fb58d (#383).
July 2025: Delivered OSDM API deprecations and data model simplification to align with the upcoming OJP migration. Deprecated the numberOfResults parameter in TripParameters and removed the direction field from Trip to simplify the data model and reduce client data-entry burden. These changes position the API for smoother evolution and lower maintenance costs, with minimal client disruption. Commits implementing the changes include 65c3ef334975ae48e7b388fc0c6db039f83cebad (#1082) and 4f004559a17a002dee528c0df7762973c86fb58d (#383).
In June 2025, delivered the OSDM 3.6.0 Release Changelog Documentation for UnionInternationalCheminsdeFer/OSDM, providing a comprehensive changelog that documents new endpoints, objects, deprecated items, and modifications to existing objects, enums, and endpoints to inform users and stakeholders about the release changes. This work supports release readiness, onboarding, and external integration planning, and establishes a standard approach for future release notes.
In June 2025, delivered the OSDM 3.6.0 Release Changelog Documentation for UnionInternationalCheminsdeFer/OSDM, providing a comprehensive changelog that documents new endpoints, objects, deprecated items, and modifications to existing objects, enums, and endpoints to inform users and stakeholders about the release changes. This work supports release readiness, onboarding, and external integration planning, and establishes a standard approach for future release notes.
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