In January 2025, S. Heunis enhanced SHACL generation in the linkml/linkml repository by improving support for URI and CURIE types with ifabsent default handling. Using Python and data modeling techniques, S. Heunis updated the map_uri_or_curie_default_value logic to ensure default values are consistently represented as URIs, addressing interoperability and schema validation needs. The work included expanding test coverage for uriorcurie range types and ifabsent scenarios, validating correct Literal representations and reducing regression risk. Although no critical bugs were fixed, the focus on schema generation and testing contributed to more reliable SHACL outputs for downstream consumers and improved overall code robustness.