Attachment relationship to the document (PDF 2.0) — pdf_attachment_af

Returns the /AFRelationship entry of the attachment's file specification dictionary: how the embedded file relates to the PDF, one of "Source", "Data", "Alternative", "Supplement", "EncryptedPayload", "FormData", "Schema", or "Unspecified" (ISO 32000-2:2020, Table 43). Associated-file relationships are how PDF/A-3 and e-invoice formats such as ZUGFeRD / Factur-X mark their machine-readable payloads. Wraps FPDFAttachment_GetAFRelationship.

Usage

pdf_attachment_af_relationship(att)

Arguments

att: A pdfium_attachment handle from pdf_attachments().

Value

Character scalar; empty when the entry is absent or not a PDF name.