During February 2026, Ultizan enhanced PDF hyperlink parsing in the DS4SD/docling-core repository by developing a PdfHyperlink URI Handling Enhancement. Using Python and leveraging backend development and data validation skills, Ultizan updated the PdfHyperlink model to support relative URIs, internal bookmarks, and fragment-only references. The technical approach involved changing the uri field to accept both AnyUrl and string types, with a validator that attempts AnyUrl parsing first and gracefully falls back to string for non-absolute URIs. This solution prevented document processing failures, reduced content loss during preprocessing, and improved reliability for downstream consumers and indexing workflows.