I look for "Collection" and "Setlist" in the metadata, and I don't currently tokenize this, meaning you can't specify multiple values at the moment (this is something I can address if people care about that). The PDF library I'm using writes the PDF metadata under <pdfx:Collection>, <pdfx:Setlist>, etc, under the rdf: Description element. The XMP looks like this:
You can see I added TestCollection there. If you create the metadata in the same way using your tool, then MobileSheets should be able to read it. The other standard fields are not under pdfx which is why they work for you right now.
Mike
Code:
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.4-c006 80.159825, 2016/09/16-03:31:08 ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about=""
xmlns:pdfx="http://ns.adobe.com/pdfx/1.3/"
xmlns:xmp="http://ns.adobe.com/xap/1.0/">
<pdfx:Collection>TestCollection</pdfx:Collection>
<xmp:ModifyDate>2023-07-04T13:12:51-07:00</xmp:ModifyDate>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>You can see I added TestCollection there. If you create the metadata in the same way using your tool, then MobileSheets should be able to read it. The other standard fields are not under pdfx which is why they work for you right now.
Mike