On 10/19/21 6:23 PM, Michal Vlasák via ntg-context wrote:
> On Tue Oct 19, 2021 at 5:47 PM CEST, Pablo Rodriguez via ntg-context wrote:
> [...]
> So this works:
>
>
>     \setupinteraction[state=start,
>       date={2022-02-02T12:00:21+02:00}]
>     \starttext
>     This document is from 02.02.2020 at 12:00:21.
>     \stoptext
>
> This parameter sets the "ModDate" is that what you are after?

Hi Michal,

many thanks for your fast reply.

I would like to import both metadata values (CreationDate and ModDate)
from another file (such as https://pdf.ousia.tk/metadata.pdf).

Besides from the fact that LMTX doesn’t work with this (only MkIV does
[already reported]), isn’t no simpler way to get ISO 8601 formatting
from doc.Info.ModDate than the following one?

  \starttext
  \startluacode
  function document.transfer_metadata(name)
    local main_doc = lpdf.epdf.load(name)
    context.setupinteraction{ title = main_doc.Info.Title }
    context.setupinteraction{ date =  main_doc.Info.ModDate:sub(3,6) ..
    "-" .. main_doc.Info.ModDate:sub(7,8) .. "-" ..
    main_doc.Info.ModDate:sub(9,10) .. "T" ..
    main_doc.Info.ModDate:sub(11,12) .. ":" ..
    main_doc.Info.ModDate:sub(13,14) .. ":" ..
    main_doc.Info.ModDate:sub(15,22):gsub("'", ":") }
    context(main_doc.Info.Title .. "\\par")
    lpdf.epdf.unload(name)
  end
  \stopluacode
  \unexpanded\def\TransferMetadata#1%
    {\ctxlua{document.transfer_metadata("#1")}}
  \startTEXpage[offset=1em, align=center]
  \TransferMetadata{metadata.pdf}
  \stopTEXpage
  \stoptext

> Seems that "CreationDate" could be set by the SOURCE_DATE_EPOCH
> environment variable, but I am not succesfull with it right now.

It would be fine to ble able to set CreationDate. Otherwise, having a
ModDate prior to CreationDate gives a weird impression.

Many thanks for your help,

Pablo
--
http://www.ousia.tk
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