org–mode through ConTeXt to a tagged PDF does not appear to be tagged

[rocky-rose]

I’m trying to convert an org–mode document to an accessible, tagged PDF document. I use a PDF accessibility analyzer called PAVE on my PDF documents, but when I generated a PDF of this org file, PAVE is saying that all the hundreds of elements on the PDF were not tagged.

I made sure that ConTeXt was installed in my mactex/TeXLive distribution, and I used the following command to generate the PDF:

pandoc --to=context+tagging exam_3_prep.org -o exam_3_prep.pdf

This is the Org file contents:

#+title: CIS 250 Exam 3 Preparation
#+author: Rocky Wright
#+date: 2025-05-15

* CIS 250 Exam 3 Preparation

Mark up this document when blindly studying it.

** ESI and EDI registers

The *“S”* in ~ESI~ stands for *“source”* and the *“D”* in ~EDI~ stands for *“destination”*. This is because many instructions on arrays and strings move data in that way. For example, *~MOVSB~* *copies* one byte of a string from *~ESI~* to *~EDI~*.

** Floating point numbers

*** Convert from decimal based fractions to IEEE format numbers

An *IEEE floating­point binary number* is stored as a contiguous sequence starting with a *sign* — *1* if negative, or *0* for positive, with *zero* being *considered positive*. The *significand* is the decimal number represented in *binary fractional form* and *repeatedly divided by 2* until the number *starts with 1*. This is called *normalization*. The *exponent* is negative or positive to *compensate for the shifts*.

*** Floating point commands

Instead of *register­based* operations on integers, the *FPU* is based on an *expression stack*. Values are *placed on the stack* with *~FLD~* as well as *operators* such as *~FADD~*, *~FSUB~*, *~FMUL~* and *~FDIV~*, and resolved in a *last in, first out* manner.

*** Postfix format

*Postfix notation* is a way of writing artithmetic expressions where *the operator comes first* and the *two operands are written afterwards*. This is closer to *how the FPU processes expressions*.

Memorize this table as well.

| Infix                   | Postfix           |
|-------------------------+-------------------|
| A + B                   | A B +             |
| (A - B) / D             | A B - D /         |
| (A + B) * (C + D)       | A B + C D + *     |
| ((A + B) / C) * (E - F) | A B + C / E F - * |

I’ve attached the PDF.

[jgm]

What does context --version say?
Our documentation suggests that a recent version may be needed for tagging to work.

[jgm]

And try with --verbose to see if the context output gives any clues.

[jgm]

I just tried this and looked at it with Adobe Acrobat, which also said "no tags available." --verbose didn't help. I see that the context source produced does contain tagging macros like \bar/\epar. Does anyone else have experience of using context to produce tagged pdfs? @tarleb ?

[rocky-rose]

It may also be worth trying adding -V pdfa=3a.

That doesn’t do anything, but here is the new PDF anyways.
exam_3_prep.pdf

[rocky-rose]

What does context --version say? Our documentation suggests that a recent version may be needed for tagging to work.

It seems it is version 1.06. The exact output of that command seems a little strange to me, each line starting with mtx-context:

mtx-context     | ConTeXt Process Management 1.06
mtx-context     |
mtx-context     | main context file: /usr/local/texlive/2025/texmf-dist/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2025.02.28 18:12
mtx-context     | main context file: /usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/context.mkxl
mtx-context     | current version: 2025.02.28 18:12

I installed it through TeX Live which I installed through Homebrew.

[rocky-rose]

And try with --verbose to see if the context output gives any clues.

Here is the output with --verbose:

[INFO] [makePDF] Temp dir:
  /private/var/folders/8l/kk0hn12j1_3_j9n1gqnkxk040000gn/T/tex2pdf.-33f57874c8ae7311
[INFO] [makePDF] Command line:
  context "--batchmode" "input.tex"
[INFO] [makePDF] Relevant environment variables:
  ("HOME","/Users/rocky")
  ("PATH","/opt/homebrew/opt/llvm/bin:/Users/rocky/Projects/gemini-demo-3/:/Users/rocky/.nix-profile/bin/:/opt/homebrew/opt/man-db/libexec/bin:/Users/rocky/.local/bin:/usr/local/bin:/Users/rocky/.nix-profile/bin:/nix/var/nix/profiles/default/bin:/opt/local/bin:/opt/local/sbin:/Library/Frameworks/Python.framework/Versions/3.11/bin:/Library/Frameworks/Python.framework/Versions/2.7/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Library/TeX/texbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Users/rocky/.cargo/bin")
  ("SHELL","/bin/zsh")
  ("TMPDIR","/var/folders/8l/kk0hn12j1_3_j9n1gqnkxk040000gn/T/")
  ("PWD","/Users/rocky/pima/Spring 2025/CIS 250")
[INFO] [makePDF] Source:
  % Enable hyperlinks
  \setupinteraction
    [state=start,
    title={CIS 250 Exam 3 Preparation},
    author={Rocky Wright},
    style=,
    color=,
    contrastcolor=]
  \setupurl[style=]

  % make chapter, section bookmarks visible when opening document
  \placebookmarks[chapter, section, subsection, subsubsection, subsubsubsection, subsubsubsubsection][chapter, section]
  \setupinteractionscreen[option={bookmark,title}]

  \setuppagenumbering[location={footer,middle}]
  % attempt to generate PDF/A
  \setupbackend
    [format=PDF/A-3a,
     profile={sRGB.icc},
     intent=sRGB IEC61966-2.1]
  \setupstructure[state=start,method=auto]

  % use microtypography
  \definefontfeature[default][default][script=latn, protrusion=quality, expansion=quality, itlc=yes, textitalics=yes, onum=yes, pnum=yes]
  \definefontfeature[default:tnum][default][tnum=yes, pnum=no]
  \definefontfeature[smallcaps][script=latn, protrusion=quality, expansion=quality, smcp=yes, onum=yes, pnum=yes]
  \setupalign[hz,hanging]
  \setupitaliccorrection[global, always]

  \setupbodyfontenvironment[default][em=italic] % use italic as em, not slanted

  \definefallbackfamily[mainface][rm][CMU Serif][preset=range:greek, force=yes]
  \definefontfamily[mainface][rm][Latin Modern Roman]
  \definefontfamily[mainface][mm][Latin Modern Math]
  \definefontfamily[mainface][ss][Latin Modern Sans]
  \definefontfamily[mainface][tt][Latin Modern Typewriter][features=none]
  \setupbodyfont[mainface]

  \setupwhitespace[medium]

  \setuphead[chapter]            [style=\tfd\setupinterlinespace,header=empty]
  \setuphead[section]            [style=\tfc\setupinterlinespace]
  \setuphead[subsection]         [style=\tfb\setupinterlinespace]
  \setuphead[subsubsection]      [style=\bf]
  \setuphead[subsubsubsection]   [style=\sc]
  \setuphead[subsubsubsubsection][style=\it]

  \definesectionlevels
     [default]
     [section, subsection, subsubsection, subsubsubsection, subsubsubsubsection]

  \setuphead[chapter, section, subsection, subsubsection, subsubsubsection, subsubsubsubsection][number=no]

  \definedescription
    [description]
    [headstyle=bold, style=normal, location=hanging, width=broad, margin=1cm, alternative=hanging]

  \setupitemize[autointro]    % prevent orphan list intro
  \setupitemize[indentnext=no]

  \defineitemgroup[enumerate]
  \setupenumerate[each][fit][itemalign=left,distance=.5em,style={\feature[+][default:tnum]}]

  \setupfloat[figure][default={here,nonumber}]
  \setupfloat[table][default={here,nonumber}]

  \setupxtable[frame=off]
  \setupxtable[head][topframe=on]
  \setupxtable[body][]
  \setupxtable[foot][]
  \setupxtable[lastrow][bottomframe=on]

  \definehighlight [strong][style={\bf}]

  \starttext
  \startalignment[middle]
    {\tfd\setupinterlinespace CIS 250 Exam 3 Preparation}
    \smallskip
    {\tfa\setupinterlinespace Rocky Wright}
    \smallskip
    {\tfa\setupinterlinespace 2025-05-15}
    \bigskip
  \stopalignment

  \startsectionlevel[title={CIS 250 Exam 3
  Preparation},reference={cis-250-exam-3-preparation-1}]

  \bpar
  Mark up this document when blindly studying it.
  \epar

  \startsectionlevel[title={ESI and EDI
  registers},reference={esi-and-edi-registers}]

  \bpar
  The \strong{“S”} in \type{ESI} stands for \strong{“source”} and the
  \strong{“D”} in \type{EDI} stands for \strong{“destination”}. This is
  because many instructions on arrays and strings move data in that way.
  For example, \strong{\type{MOVSB}} \strong{copies} one byte of a string
  from \strong{\type{ESI}} to \strong{\type{EDI}}.
  \epar

  \stopsectionlevel

  \startsectionlevel[title={Floating point
  numbers},reference={floating-point-numbers}]

  \startsectionlevel[title={Convert from decimal based fractions to IEEE
  format
  numbers},reference={convert-from-decimal-based-fractions-to-ieee-format-numbers}]

  \bpar
  An \strong{IEEE floating­point binary number} is stored as a contiguous
  sequence starting with a \strong{sign} — \strong{1} if negative, or
  \strong{0} for positive, with \strong{zero} being \strong{considered
  positive}. The \strong{significand} is the decimal number represented in
  \strong{binary fractional form} and \strong{repeatedly divided by 2}
  until the number \strong{starts with 1}. This is called
  \strong{normalization}. The \strong{exponent} is negative or positive to
  \strong{compensate for the shifts}.
  \epar

  \stopsectionlevel

  \startsectionlevel[title={Floating point
  commands},reference={floating-point-commands}]

  \bpar
  Instead of \strong{register­based} operations on integers, the
  \strong{FPU} is based on an \strong{expression stack}. Values are
  \strong{placed on the stack} with \strong{\type{FLD}} as well as
  \strong{operators} such as \strong{\type{FADD}}, \strong{\type{FSUB}},
  \strong{\type{FMUL}} and \strong{\type{FDIV}}, and resolved in a
  \strong{last in, first out} manner.
  \epar

  \stopsectionlevel

  \startsectionlevel[title={Postfix format},reference={postfix-format}]

  \bpar
  \strong{Postfix notation} is a way of writing artithmetic expressions
  where \strong{the operator comes first} and the \strong{two operands are
  written afterwards}. This is closer to \strong{how the FPU processes
  expressions}.
  \epar

  \bpar
  Memorize this table as well.
  \epar

  \startplacetable[location=none]
  \startxtable
  \startxtablehead[head]
  \startxrowgroup[lastrow]
  \startxrow
  \startxcell \bpar{}Infix\epar{} \stopxcell
  \startxcell \bpar{}Postfix\epar{} \stopxcell
  \stopxrow
  \stopxrowgroup
  \stopxtablehead
  \startxtablebody[body]
  \startxrow
  \startxcell \bpar{}A + B\epar{} \stopxcell
  \startxcell \bpar{}A B +\epar{} \stopxcell
  \stopxrow
  \startxrow
  \startxcell \bpar{}(A - B) / D\epar{} \stopxcell
  \startxcell \bpar{}A B - D /\epar{} \stopxcell
  \stopxrow
  \startxrow
  \startxcell \bpar{}(A + B) * (C + D)\epar{} \stopxcell
  \startxcell \bpar{}A B + C D + *\epar{} \stopxcell
  \stopxrow
  \startxrowgroup[lastrow]
  \startxrow
  \startxcell \bpar{}((A + B) / C) * (E - F)\epar{} \stopxcell
  \startxcell \bpar{}A B + C / E F - *\epar{} \stopxcell
  \stopxrow
  \stopxrowgroup
  \stopxtablebody
  \startxtablefoot[foot]
  \stopxtablefoot
  \stopxtable
  \stopplacetable

  \stopsectionlevel

  \stopsectionlevel

  \stopsectionlevel

  \stoptext
[INFO] [makePDF] ConTeXt run output

  resolvers       | formats | executing runner 'run luametatex format': /usr/local/texlive/2025/bin/universal-darwin/luametatex --interaction="batchmode" --jobname="./input.tex" --socket --shell-escape --fmt=/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luametatex/cont-en.fmt --lua=/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luametatex/cont-en.lui  --c:batchmode --c:currentrun=1 --c:fulljobname="./input.tex" --c:input="./input.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:texmfbinpath="/Library/TeX/texbin"
  system          >
  system          > ConTeXt  ver: 2025.02.28 18:12 LMTX  fmt: 2025.5.14  int: english/english
  system          >
  system          > 'cont-new.mkxl' loaded
  open source     > level 1, order 1, name '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
  system          > beware: some patches loaded from cont-new.mkiv
  close source    > level 1, order 1, name '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
  system          > 'cont-sys.mkxl' loaded
  open source     > level 1, order 2, name '/usr/local/texlive/2025/texmf-dist/tex/context/texlive/cont-sys.mkxl'
  open source     > level 2, order 3, name '/usr/local/texlive/2025/texmf-config/tex/context/user/context-papersize.tex'
  close source    > level 2, order 3, name '/usr/local/texlive/2025/texmf-config/tex/context/user/context-papersize.tex'
  close source    > level 1, order 3, name '/usr/local/texlive/2025/texmf-dist/tex/context/texlive/cont-sys.mkxl'

  system          > files > jobname './input', input './input.tex', result './input'
  fonts           > latin modern fonts are not preloaded
  languages       > language 'en' is active
  open source     > level 1, order 4, name './input.tex'
  backend         > profiles > setting format 'PDF/A-3a' to 'pdf/a-3a'
  backend         > profiles > forcing pdf version 1.7, compression level 3, object compression level 3
  backend         > profiles > permitted colorspaces: rgb 'yes', cmyk 'yes'
  colors          > defining > supported models: gray 'true', rgb 'true', cmyk 'true', spot 'true'
  transparencies  > support > transparency is supported
  viewerlayers    > viewerlayers are not supported
  backend         > xmp > using file '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkiv/lpdf-pda.xml'
  backend         > profiles > profile specification 'sRGB.icc' loaded from '/usr/local/texlive/2025/texmf-dist/tex/context/colors/icc/context/colorprofiles.xml'
  backend         > profiles > setting 'srgb.icc' as default 'rgb' color space
  backend         > profiles > profile specification 'sRGB IEC61966-2.1' loaded from '/usr/local/texlive/2025/texmf-dist/tex/context/colors/icc/context/colorprofiles.xml'
  fonts           > ignoring feature overload 'script' in 'default'
  fonts           > ignoring feature overload 'itlc' in 'default'
  fonts           > ignoring feature overload 'pnum' in 'default'
  selectfont      > the requested font 'Latin Modern Typewriter' has no files for the 'tf' alternative, Latin Modern is used instead.
  fonts           > defining > font 'lmroman10-regular', feature 'locl', script 'latn', no language 'dflt'
  fonts           > goodies > goodie file 'modern' is not found (suffixes: lfg lua)
  structures      > bookmark: CIS 250 Exam 3 Preparation
  structure       > sectioning > section @ level 3 : 0.0.1 -> CIS 250 Exam 3 Preparation
  structures      > bookmark: ESI and EDI registers
  structure       > sectioning > subsection @ level 4 : 0.0.1.1 -> ESI and EDI registers
  fonts           > defining > font 'lmroman10-bold', feature 'locl', script 'latn', no language 'dflt'
  structures      > bookmark: Floating point numbers
  structure       > sectioning > subsection @ level 4 : 0.0.1.2 -> Floating point numbers
  structures      > bookmark: Convert from decimal based fractions to IEEE format numbers
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.1 -> Convert from decimal based fractions to IEEE format numbers
  structures      > bookmark: Floating point commands
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.2 -> Floating point commands
  structures      > bookmark: Postfix format
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.3 -> Postfix format
  pages           > flushing realpage 1, userpage 1, subpage 1
  floatblocks     > '1' placed (here)
  pages           > flushing realpage 2, userpage 2, subpage 2
  close source    > level 1, order 4, name './input.tex'
  mkiv lua stats  > used config file: selfautoparent:/texmfcnf.lua;selfautoparent:/texmf-dist/web2c/texmfcnf.lua
  mkiv lua stats  > used cache path: readable+writable: '/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9'
  mkiv lua stats  > resource resolver: loadtime 0.063 seconds, 0 scans with scantime 0.000 seconds, 0 shared scans, 23 found files, scanned paths: <none>
  mkiv lua stats  > stored bytecode data: 526 modules (0.185 sec), 106 tables (0.006 sec), 632 chunks (0.191 sec)
  mkiv lua stats  > traced context lua functions: maxstack: 1858, freed: 0, unreachable: 1858
  mkiv lua stats  > cleaned up reserved nodes: 76 nodes, 7 lists of 444
  mkiv lua stats  > node memory usage: 9 attribute, 12 fontspec, 1 glue, 135 gluespec, 1 kern, 657 mathspec, 2 penalty, 29 specification, 2 temp
  mkiv lua stats  > node list callback tasks: 16 unique task lists, 10 instances (re)created, 520 calls
  mkiv lua stats  > used backend: pdf
  mkiv lua stats  > randomizer: initialized with value 0.81574455523435574
  mkiv lua stats  > jobdata time: 0.001 seconds saving, 0.000 seconds loading
  mkiv lua stats  > callbacks: file: 385, saved: 1343, direct: 3, function: 1276, value: 553, message: 0, bytecode: 632, late 0, total: 4192 (0 per page)
  mkiv lua stats  > loaded patterns: en::1, load time: 0.000
  mkiv lua stats  > xml load time: 0.001 seconds, 2 files, 2 converted
  mkiv lua stats  > lxml preparation time: 0.000 seconds, 0 nodes, 46 lpath calls, 13 cached calls
  mkiv lua stats  > interactive elements: 0 references, 6 destinations
  mkiv lua stats  > loaded fonts: 7 files: cmunbx.otf, cmunrm.otf, latinmodern-math.otf, lmmono10-regular.otf, lmmonolt10-bold.otf, lmroman10-bold.otf, lmroman10-regular.otf
  mkiv lua stats  > font engine: otf 3.144, afm 1.541, tfm 1.000, 7 instances, load time 0.033 seconds
  mkiv lua stats  > font embedding time: 0.002 seconds, 4 fonts
  mkiv lua stats  > result saved in file: input.pdf, compresslevel 1, objectcompresslevel 3, 16 streams, 0 uncompressed, 14 compressed, 2 not compressed, threshold 40
  mkiv lua stats  > positions: 4 collected, 0 deltas, 0 shared partials, 0 partial entries
  mkiv lua stats  > used platform: osx-arm, type: unix, binary subtree: bin
  mkiv lua stats  > used engine: luametatex version: 2.11.07, functionality level: 20250226, format id: 717, compiler: clang
  mkiv lua stats  > tex properties: 938216 hash slots used of 2097152, 52599 control sequences, approximate memory usage: 112 MB
  mkiv lua stats  > lua properties: engine: lua 5.5, format 5, used memory: 90 MB, ctx: 86 MB, max: 97 MB, symbol mask: utf (τεχ)
  mkiv lua stats  > runtime: 0.319 seconds, 2 processed pages, 2 shipped pages, 6.279 pages/second

  resolvers       | formats | executing runner 'run luametatex format': /usr/local/texlive/2025/bin/universal-darwin/luametatex --interaction="batchmode" --jobname="./input.tex" --socket --shell-escape --fmt=/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luametatex/cont-en.fmt --lua=/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luametatex/cont-en.lui  --c:batchmode --c:currentrun=2 --c:fulljobname="./input.tex" --c:input="./input.tex" --c:kindofrun=2 --c:maxnofruns=9 --c:texmfbinpath="/Library/TeX/texbin"
  system          >
  system          > ConTeXt  ver: 2025.02.28 18:12 LMTX  fmt: 2025.5.14  int: english/english
  system          >
  system          > 'cont-new.mkxl' loaded
  open source     > level 1, order 1, name '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
  system          > beware: some patches loaded from cont-new.mkiv
  close source    > level 1, order 1, name '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
  system          > 'cont-sys.mkxl' loaded
  open source     > level 1, order 2, name '/usr/local/texlive/2025/texmf-dist/tex/context/texlive/cont-sys.mkxl'
  open source     > level 2, order 3, name '/usr/local/texlive/2025/texmf-config/tex/context/user/context-papersize.tex'
  close source    > level 2, order 3, name '/usr/local/texlive/2025/texmf-config/tex/context/user/context-papersize.tex'
  close source    > level 1, order 3, name '/usr/local/texlive/2025/texmf-dist/tex/context/texlive/cont-sys.mkxl'

  system          > files > jobname './input', input './input.tex', result './input'
  fonts           > latin modern fonts are not preloaded
  languages       > language 'en' is active
  open source     > level 1, order 4, name './input.tex'
  backend         > profiles > setting format 'PDF/A-3a' to 'pdf/a-3a'
  backend         > profiles > forcing pdf version 1.7, compression level 3, object compression level 3
  backend         > profiles > permitted colorspaces: rgb 'yes', cmyk 'yes'
  colors          > defining > supported models: gray 'true', rgb 'true', cmyk 'true', spot 'true'
  transparencies  > support > transparency is supported
  viewerlayers    > viewerlayers are not supported
  backend         > xmp > using file '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkiv/lpdf-pda.xml'
  backend         > profiles > profile specification 'sRGB.icc' loaded from '/usr/local/texlive/2025/texmf-dist/tex/context/colors/icc/context/colorprofiles.xml'
  backend         > profiles > setting 'srgb.icc' as default 'rgb' color space
  backend         > profiles > profile specification 'sRGB IEC61966-2.1' loaded from '/usr/local/texlive/2025/texmf-dist/tex/context/colors/icc/context/colorprofiles.xml'
  fonts           > ignoring feature overload 'script' in 'default'
  fonts           > ignoring feature overload 'itlc' in 'default'
  fonts           > ignoring feature overload 'pnum' in 'default'
  selectfont      > the requested font 'Latin Modern Typewriter' has no files for the 'tf' alternative, Latin Modern is used instead.
  fonts           > defining > font 'lmroman10-regular', feature 'locl', script 'latn', no language 'dflt'
  fonts           > goodies > goodie file 'modern' is not found (suffixes: lfg lua)
  structures      > bookmark: CIS 250 Exam 3 Preparation
  structure       > sectioning > section @ level 3 : 0.0.1 -> CIS 250 Exam 3 Preparation
  structures      > bookmark: ESI and EDI registers
  structure       > sectioning > subsection @ level 4 : 0.0.1.1 -> ESI and EDI registers
  fonts           > defining > font 'lmroman10-bold', feature 'locl', script 'latn', no language 'dflt'
  structures      > bookmark: Floating point numbers
  structure       > sectioning > subsection @ level 4 : 0.0.1.2 -> Floating point numbers
  structures      > bookmark: Convert from decimal based fractions to IEEE format numbers
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.1 -> Convert from decimal based fractions to IEEE format numbers
  structures      > bookmark: Floating point commands
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.2 -> Floating point commands
  structures      > bookmark: Postfix format
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.3 -> Postfix format
  pages           > flushing realpage 1, userpage 1, subpage 1
  floatblocks     > '1' placed (here)
  pages           > flushing realpage 2, userpage 2, subpage 2
  close source    > level 1, order 4, name './input.tex'
  mkiv lua stats  > used config file: selfautoparent:/texmfcnf.lua;selfautoparent:/texmf-dist/web2c/texmfcnf.lua
  mkiv lua stats  > used cache path: readable+writable: '/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9'
  mkiv lua stats  > resource resolver: loadtime 0.054 seconds, 0 scans with scantime 0.000 seconds, 0 shared scans, 23 found files, scanned paths: <none>
  mkiv lua stats  > stored bytecode data: 526 modules (0.166 sec), 106 tables (0.006 sec), 632 chunks (0.171 sec)
  mkiv lua stats  > traced context lua functions: maxstack: 1858, freed: 0, unreachable: 1858
  mkiv lua stats  > cleaned up reserved nodes: 76 nodes, 7 lists of 444
  mkiv lua stats  > node memory usage: 9 attribute, 12 fontspec, 1 glue, 135 gluespec, 1 kern, 657 mathspec, 2 penalty, 29 specification, 2 temp
  mkiv lua stats  > node list callback tasks: 16 unique task lists, 10 instances (re)created, 520 calls
  mkiv lua stats  > used backend: pdf
  mkiv lua stats  > randomizer: resumed with value 0.81574455523435574
  mkiv lua stats  > jobdata time: 0.001 seconds saving, 0.000 seconds loading
  mkiv lua stats  > callbacks: file: 385, saved: 1343, direct: 3, function: 1276, value: 553, message: 0, bytecode: 632, late 0, total: 4192 (2096 per page)
  mkiv lua stats  > loaded patterns: en::1, load time: 0.000
  mkiv lua stats  > xml load time: 0.001 seconds, 2 files, 2 converted
  mkiv lua stats  > lxml preparation time: 0.000 seconds, 0 nodes, 46 lpath calls, 13 cached calls
  mkiv lua stats  > interactive elements: 0 references, 6 destinations
  mkiv lua stats  > loaded fonts: 7 files: cmunbx.otf, cmunrm.otf, latinmodern-math.otf, lmmono10-regular.otf, lmmonolt10-bold.otf, lmroman10-bold.otf, lmroman10-regular.otf
  mkiv lua stats  > font engine: otf 3.144, afm 1.541, tfm 1.000, 7 instances, load time 0.032 seconds
  mkiv lua stats  > font embedding time: 0.002 seconds, 4 fonts
  mkiv lua stats  > result saved in file: input.pdf, compresslevel 1, objectcompresslevel 3, 16 streams, 0 uncompressed, 14 compressed, 2 not compressed, threshold 40
  mkiv lua stats  > positions: 4 collected, 0 deltas, 0 shared partials, 0 partial entries
  mkiv lua stats  > used platform: osx-arm, type: unix, binary subtree: bin
  mkiv lua stats  > used engine: luametatex version: 2.11.07, functionality level: 20250226, format id: 717, compiler: clang
  mkiv lua stats  > tex properties: 938216 hash slots used of 2097152, 52598 control sequences, approximate memory usage: 112 MB
  mkiv lua stats  > lua properties: engine: lua 5.5, format 5, used memory: 88 MB, ctx: 85 MB, max: 86 MB, symbol mask: utf (τεχ)
  mkiv lua stats  > runtime: 0.285 seconds, 2 processed pages, 2 shipped pages, 7.011 pages/second

  resolvers       | formats | executing runner 'run luametatex format': /usr/local/texlive/2025/bin/universal-darwin/luametatex --interaction="batchmode" --jobname="./input.tex" --socket --shell-escape --fmt=/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luametatex/cont-en.fmt --lua=/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9/formats/luametatex/cont-en.lui  --c:batchmode --c:currentrun=3 --c:fulljobname="./input.tex" --c:input="./input.tex" --c:kindofrun=2 --c:maxnofruns=9 --c:texmfbinpath="/Library/TeX/texbin"
  system          >
  system          > ConTeXt  ver: 2025.02.28 18:12 LMTX  fmt: 2025.5.14  int: english/english
  system          >
  system          > 'cont-new.mkxl' loaded
  open source     > level 1, order 1, name '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
  system          > beware: some patches loaded from cont-new.mkiv
  close source    > level 1, order 1, name '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkxl/cont-new.mkxl'
  system          > 'cont-sys.mkxl' loaded
  open source     > level 1, order 2, name '/usr/local/texlive/2025/texmf-dist/tex/context/texlive/cont-sys.mkxl'
  open source     > level 2, order 3, name '/usr/local/texlive/2025/texmf-config/tex/context/user/context-papersize.tex'
  close source    > level 2, order 3, name '/usr/local/texlive/2025/texmf-config/tex/context/user/context-papersize.tex'
  close source    > level 1, order 3, name '/usr/local/texlive/2025/texmf-dist/tex/context/texlive/cont-sys.mkxl'

  system          > files > jobname './input', input './input.tex', result './input'
  fonts           > latin modern fonts are not preloaded
  languages       > language 'en' is active
  open source     > level 1, order 4, name './input.tex'
  backend         > profiles > setting format 'PDF/A-3a' to 'pdf/a-3a'
  backend         > profiles > forcing pdf version 1.7, compression level 3, object compression level 3
  backend         > profiles > permitted colorspaces: rgb 'yes', cmyk 'yes'
  colors          > defining > supported models: gray 'true', rgb 'true', cmyk 'true', spot 'true'
  transparencies  > support > transparency is supported
  viewerlayers    > viewerlayers are not supported
  backend         > xmp > using file '/usr/local/texlive/2025/texmf-dist/tex/context/base/mkiv/lpdf-pda.xml'
  backend         > profiles > profile specification 'sRGB.icc' loaded from '/usr/local/texlive/2025/texmf-dist/tex/context/colors/icc/context/colorprofiles.xml'
  backend         > profiles > setting 'srgb.icc' as default 'rgb' color space
  backend         > profiles > profile specification 'sRGB IEC61966-2.1' loaded from '/usr/local/texlive/2025/texmf-dist/tex/context/colors/icc/context/colorprofiles.xml'
  fonts           > ignoring feature overload 'itlc' in 'default'
  fonts           > ignoring feature overload 'script' in 'default'
  fonts           > ignoring feature overload 'pnum' in 'default'
  selectfont      > the requested font 'Latin Modern Typewriter' has no files for the 'tf' alternative, Latin Modern is used instead.
  fonts           > defining > font 'lmroman10-regular', feature 'locl', script 'latn', no language 'dflt'
  fonts           > goodies > goodie file 'modern' is not found (suffixes: lfg lua)
  structures      > bookmark: CIS 250 Exam 3 Preparation
  structure       > sectioning > section @ level 3 : 0.0.1 -> CIS 250 Exam 3 Preparation
  structures      > bookmark: ESI and EDI registers
  structure       > sectioning > subsection @ level 4 : 0.0.1.1 -> ESI and EDI registers
  fonts           > defining > font 'lmroman10-bold', feature 'locl', script 'latn', no language 'dflt'
  structures      > bookmark: Floating point numbers
  structure       > sectioning > subsection @ level 4 : 0.0.1.2 -> Floating point numbers
  structures      > bookmark: Convert from decimal based fractions to IEEE format numbers
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.1 -> Convert from decimal based fractions to IEEE format numbers
  structures      > bookmark: Floating point commands
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.2 -> Floating point commands
  structures      > bookmark: Postfix format
  structure       > sectioning > subsubsection @ level 5 : 0.0.1.2.3 -> Postfix format
  pages           > flushing realpage 1, userpage 1, subpage 1
  floatblocks     > '1' placed (here)
  pages           > flushing realpage 2, userpage 2, subpage 2
  close source    > level 1, order 4, name './input.tex'
  mkiv lua stats  > used config file: selfautoparent:/texmfcnf.lua;selfautoparent:/texmf-dist/web2c/texmfcnf.lua
  mkiv lua stats  > used cache path: readable+writable: '/Users/rocky/Library/texlive/2025/texmf-var/luametatex-cache/context/a86c089b384a3076dc514ba966a1fac9'
  mkiv lua stats  > resource resolver: loadtime 0.056 seconds, 0 scans with scantime 0.000 seconds, 0 shared scans, 23 found files, scanned paths: <none>
  mkiv lua stats  > stored bytecode data: 526 modules (0.168 sec), 106 tables (0.006 sec), 632 chunks (0.174 sec)
  mkiv lua stats  > traced context lua functions: maxstack: 1858, freed: 0, unreachable: 1858
  mkiv lua stats  > cleaned up reserved nodes: 76 nodes, 7 lists of 444
  mkiv lua stats  > node memory usage: 9 attribute, 12 fontspec, 1 glue, 135 gluespec, 1 kern, 657 mathspec, 2 penalty, 29 specification, 2 temp
  mkiv lua stats  > node list callback tasks: 16 unique task lists, 10 instances (re)created, 520 calls
  mkiv lua stats  > used backend: pdf
  mkiv lua stats  > randomizer: resumed with value 0.81574455523435574
  mkiv lua stats  > jobdata time: 0.001 seconds saving, 0.000 seconds loading
  mkiv lua stats  > callbacks: file: 385, saved: 1343, direct: 3, function: 1276, value: 553, message: 0, bytecode: 632, late 0, total: 4192 (2096 per page)
  mkiv lua stats  > loaded patterns: en::1, load time: 0.000
  mkiv lua stats  > xml load time: 0.001 seconds, 2 files, 2 converted
  mkiv lua stats  > lxml preparation time: 0.000 seconds, 0 nodes, 46 lpath calls, 13 cached calls
  mkiv lua stats  > interactive elements: 0 references, 6 destinations
  mkiv lua stats  > loaded fonts: 7 files: cmunbx.otf, cmunrm.otf, latinmodern-math.otf, lmmono10-regular.otf, lmmonolt10-bold.otf, lmroman10-bold.otf, lmroman10-regular.otf
  mkiv lua stats  > font engine: otf 3.144, afm 1.541, tfm 1.000, 7 instances, load time 0.033 seconds
  mkiv lua stats  > font embedding time: 0.002 seconds, 4 fonts
  mkiv lua stats  > result saved in file: input.pdf, compresslevel 1, objectcompresslevel 3, 16 streams, 0 uncompressed, 14 compressed, 2 not compressed, threshold 40
  mkiv lua stats  > positions: 4 collected, 0 deltas, 0 shared partials, 0 partial entries
  mkiv lua stats  > used platform: osx-arm, type: unix, binary subtree: bin
  mkiv lua stats  > used engine: luametatex version: 2.11.07, functionality level: 20250226, format id: 717, compiler: clang
  mkiv lua stats  > tex properties: 938216 hash slots used of 2097152, 52598 control sequences, approximate memory usage: 112 MB
  mkiv lua stats  > lua properties: engine: lua 5.5, format 5, used memory: 88 MB, ctx: 84 MB, max: 86 MB, symbol mask: utf (τεχ)
  mkiv lua stats  > runtime: 0.289 seconds, 2 processed pages, 2 shipped pages, 6.931 pages/second
  system          | total runtime: 0.918 seconds of 1.001 seconds

I am currently reading and analyzing the output.

[tarleb]

I seem to remember a short thread about tagging on the ConTeXt mailing list. The main dev stated that tagging is currently not a priority for the devs, so maybe they disabled it somehow.

[tarleb]

To add: large parts of the context system have been rewritten, it is now based on LuaMetaTeX. Maybe the tagging code hasn't been transferred yet.

[denismaier]

@tarleb No, that shouldn't be the case. Tagging should be available. There's a manual on tagging.

@rocky-rose As you've installed ConTeXt via TeXlive, you might also want to try with a regular ConTeXt installation. Maybe there have been some fixes in a never version.

[jgm]

That's helpful. The manual starts by saying that tagging in a document is enabled with:

\setupbackend[format=pdf/ua-2]
\setuptagging[state=start]

I don't see a \setuptagging in our output with +tagging, so apparently we aren't including everything that is required by the current context version (perhaps it worked in the past). To do: read this manual and figure out what needs to be added.

[jgm]

I can confirm that adding these two lines to the beginning of the generated context enables tags:

\setupbackend[format=pdf/ua-2]
\setuptagging[state=start]

I can now see the tags in Acrobat.
We'll have to think about how to integrate this into the default template, but for now you can just create a custom template by adding these two lines to the beginning of the default one.

[jgm]

From that manual it seems that there are other changes that will be needed as well. E.g. \startsection instead of \startsectionlevel, and \startparagraph instead of \bpar...

[denismaier]

Startsectionlevel should work. Gesendet von Outlook für Android<https://aka.ms/AAb9ysg>

…

________________________________ From: John MacFarlane ***@***.***> Sent: Thursday, May 15, 2025 7:21:31 PM To: jgm/pandoc ***@***.***> Cc: Maier, Denis Christian (UB) ***@***.***>; Comment ***@***.***> Subject: Re: [jgm/pandoc] org–mode through ConTeXt to a tagged PDF does not appear to be tagged (Discussion #10846) From that manual it seems that there are other changes that will be needed as well. E.g. \startsection instead of \startsectionlevel, and \startparagraph instead of \bpar... — Reply to this email directly, view it on GitHub<#10846 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABDTWJQ2WLF6X7MLSDTQDPD26TEJXAVCNFSM6AAAAAB5EYBJKSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTGMJWGE3TCNA>. You are receiving this because you commented.Message ID: ***@***.***>

[jgm]

I've pushed a fix.
Commit cf795b0

[jgm]

I just tried the experiment above (non-docker version) on my machine, and I got tagging.
context installed via nixpkgs texlive: version

2024.02.27 09:18

I did not use PAVE, but checked with pdfinfo and Adobe Acrobat.

Try renaming default.context to make sure pandoc is getting the file from your local directory and not from its defaults...

[tarleb]

Still no tagging after renaming. I guess that means that it's a context version issue?

This is what TeXLive 2024 ships:

mtx-context     | ConTeXt Process Management 1.06
mtx-context     |
mtx-context     | main context file: /opt/texlive/texdir/texmf-dist/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2025.02.28 18:12
mtx-context     | main context file: /opt/texlive/texdir/texmf-dist/tex/context/base/mkxl/context.mkxl
mtx-context     | current version: 2025.02.28 18:12

[jgm]

Odd, because your context is newer than mine!

[tarleb]

I found one of the threads discussing tagging on the ConTeXt mailing list. One mail mentions the command below, and with that I do get a tagged PDF.

\enabledirectives[backend.usetags=mkiv]

I don't know if we can simply add that, or if this will cause problems for users of mkxl instead of mkiv.

[jgm]

Excellent. I tried it on my end, and it works fine with my version of context too. So I'm going to add this.

[rocky-rose]

Okay, I will close this as I am now seeing that after switching pandoc and ConTeXt over to Nix the output is tagged in PAVE! Thanks so much for the fix @jgm and everyone else who helped.