On 2/4/2022 7:29 PM, Karl Pettersson via ntg-context wrote:
> Hi
>
> PDF/A files generated using ConTeXt fail validation with veraPDF, and
> the reason seems to be that the dc:description metadata is defined with
> the wrong type in the embedded XMP extension schema.
>
> https://tex.stackexchange.com/questions/632380/generate-pdf-a-with-context
>
> https://github.com/veraPDF/veraPDF-library/issues/1224
>
> I can reproduce the problem using TeX Live 2021 (MkIV 2021.03.05). The
> definition seems to be controlled by this code.
>
> https://source.contextgarden.net/tex/context/base/mkiv/lpdf-pua.xml?search=rdf#l81

so "dc:description" is not permitted? it is mentioned in

https://www.dublincore.org/specifications/dublin-core/dcmi-terms/#http://purl.org/dc/elements/1.1/description