ValidatePdfUa2AssociatedFileSemantics function

Validates relationship, ownership, reading order, and discoverability of PDF/UA-2 associated files

ValidatePdfUa2AssociatedFileSemantics examines every element whose HasAssociatedFile flag is set

The AssociatedFileRelationship must be one of Source, Data, Alternative, Supplement, EncryptedPayload, FormData, or Schema, and AssociatedFileDescription must be non-empty, otherwise pvuaiAssociatedFileSemanticInvalid is reported

The file must be owned by the catalogue or by the structure tree, and a file registered in the embedded-files name tree must also be declared in the catalogue, otherwise pvuaiAssociatedFileOwnershipInvalid is reported

A structure-declared file must carry a non-negative AssociatedFileReadingOrderIndex that is unique and does not decrease across structure declarations, otherwise pvuaiAssociatedFileReadingOrderInvalid is reported

The file must be discoverable, meaning catalogue-declared or structure-declared with a valid reading order index, otherwise pvuaiAssociatedFileDiscoverabilityInvalid is reported

• Reading order indices are compared in element order, so the array must reflect the document's reading sequence
• ValidatePdfUa2FormulaSemantics applies the same relationship and description check to elements it visits
• ValidatePdfUa2StructureElements merges this rule family into the full PDF/UA-2 structure check

ValidatePdfUa2StructureElements, ValidatePdfUa2FormulaSemantics, TPdf.StructureElements, TPdf.ValidatePdfUa