Hi Pablo, Yes, this PDF works, even in Acrobat. Thank you so much. This should be good enough for the figures. I will play with the math next and report back…
Thanks again! Matthias > On Apr 9, 2025, at 12:40 PM, Pablo Rodriguez via ntg-context > <ntg-context@ntg.nl> wrote: > > On 4/9/25 11:41, Matthias Weber wrote: >> Hi Pablo (and Hans) >>> No, Acrobat reports an empty page when reading the text, and Preview >> (on the Mac) doesn’t read anything either. >> I can’t find the text when looking at the pdf in an editor. > > Hi Matthias, > > the attached PDF document should work now. > > Unfortunately Acrobat Reader doesn’t work for me at all (reading texts > alould). But I was able to see the value of /Alt (alternative text) with > the editor from https://www.ngpdf.com/. > > There were two issues here: > > First, image was originally tagged as /NonStruct instead of /Figure > (which I changed with lpdf-tag-imp-testing.lmt). > > Second, /Alt wasn’t properly placed. veraPDF rightly warns about no /Alt > or /ActualText (after having the image tagged as figure). > > /Alt is an entry in a /StructElem dictionary (the parent of /K, where > ConTeXt places it now > [https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf#page=567]). > > After manually placing /Alt in the parent dictionary of /K and both > veraPDF and https://www.ngpdf.com/ work fine now. > > BTW, when adding a formula (source plus mapping below), veraPDF warns > about no /Alt or /ActualText for the formula (which is a requirement for > PDF/UA-1, no mathml in this version [at least, no mention to mathml in > the veraPDF validation rules]). > > Hans, I’m afraid that this haven’t been visible due to images not tagged > as figures. Could it be fixed? > > Many thanks for your help, > > Pablo > <b.pdf><testing-tagging.tex><lpdf-tag-imp-testing.lmt>___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the > Wiki! > > maillist : ntg-context@ntg.nl / > https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl > webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) > archive : https://github.com/contextgarden/context > wiki : https://wiki.contextgarden.net > ___________________________________________________________________________________ ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___________________________________________________________________________________
