function InspectPdfAMetadata: TPdfAMetadataReport;
| Result | TPdfAMetadataReport containing XMP availability, parse error text, mismatch fields, and eight per-field comparisons |
The method reads Title, Author, Subject, Keywords, Creator, Producer, CreationDate, and ModDate through PDFium so PDFDocEncoding and UTF-16 strings use the same Unicode decoding as the live document
Raw dictionary inspection records whether each Info key exists independently from its value, so an explicitly empty string is not treated as an absent key
Title and Subject require an rdf:Alt value tagged x-default; Author requires an rdf:Seq containing exactly one value; the other mappings require a simple property found by namespace URI and local name
Text values compare by exact Unicode code points; dates compare as local components when neither value has a timezone or as UTC instants when both values carry timezones
TPdfAMetadataState distinguishes not-required, equivalent, missing XMP, wrong RDF type, value mismatch, invalid Info date, and invalid XMP date states
The method is read-only, requires an active document, and does not modify PDFium or source state
var Report: TPdfAMetadataReport;
Report := Pdf1.InspectPdfAMetadata;
if Report.HasXmpPacket and not Report.IsEquivalent then
ShowMessage(IntToStr(Length(Report.Comparisons)) + ' fields inspected');