[NTG-context] Tagged export breaks r2l alignment in tabulate

[Wolfgang Schuster]

Denis Maier schrieb am 23.09.2020 um 14:14:
> Hi,
>
> this example produces correctly aligned right-to-left text:
>
> ============
> \setupalign[verytolerant,stretch]
> \setupdirections[bidi=global,method=unicode]
>
> \starttext
>
> \starttabulate[|p|p|]
> \NC Text
> \NC Translation
> \NC\NR
> \NC\setupalign[r2l]\input ward
> \NC\input ward
> \NC\NR
> \stoptabulate
>
> \stoptext
> ==============
>
> But, this here fails:
>
> ============
> \setupalign[verytolerant,stretch]
> \setupdirections[bidi=global,method=unicode]
> \setupbackend[export=yes]
> \setupstructure[state=start,method=auto]
>
> \starttext
>
> \starttabulate[|p|p|]
> \NC Text
> \NC Translation
> \NC\NR
> \NC\setupalign[r2l]\input ward
> \NC\input ward
> \NC\NR
> \stoptabulate
>
> \stoptext
> ==============
>
> Why is that?

The export can lead to unwanted results in the PDF and should always be 
done in a separate run.

> And what can I do about it? (I need tagged pdf for PDF/A compliance.)

You do you use export when you need only tagging?


You can enable tagging with

     \setuptagging[state=start]

and to set the PDF format use \setupbackend but ignore the export key.

Wolfgang