Tilman Hausherr asked that I open two separate issues for the finding in
TIKA-1678 that XMPBox is not generating a valid dc:title entry in the XMP. This issue is meant to track preflight's failure to detect this problem.
What PDFBox does:
It should be:
Error message from the PDF-Tools validator:
'dc:li' is not allowed in arrays. The elements must be rdf:li or rdf:_N, where N is a positive number.
There is only one RDF resource allowed in XMP.