PDF/UA XMP metadata missing so far #37
Description
Steps to reproduce
Compile a minimal file like minimal-pdftex.tex from this repository and run it through PAC3. The validator will give an error "Metadata->missing PDF/UA tag". Indeed when you watch in Acrobat->file properties->metadata you see it's not there.
Expected behaviour
A specific metadata is mandatory for PDF/UA according to ISO 14289‑1.
Comment
Scott from hxperxmp is working on implementing this in his package. So I suggest we don't waste time here and wait for it to complete. We can then add something like \Requirepackage{hyperxmp}