March 2019 - dev-context - NTG Mailing Lists

Luatex 1.08.0 announcement
by luigi scarso 28 Oct '19

28 Oct '19

============================================================== LuaTeX 1.08 2018-08-28 ============================================================== (1) This release is a prelude to 1.10, the next stable iteration of LuaTeX after version 1.00. (2) Lua 5.3 is now considered to be default and we might use 5.4 in version 1.10. There are no real functional changed expected. You still need to rename the binary for 5.3! (3) Binary mode is no longer available in MPlib but it is still available in stand alone MetaPost. This simplifies compilation and reduces dependencies. (4) The dependency on Poppler for pdf image inclusion has been removed. We now use a small dedicated library written by Pawel Jakowski. We no longer need c++ compilers. We're in the process of making it behave well on all platforms. It has been tested on intel platforms. (5) We know that there can be some (alignment) issues with the arm platform but these are looked into. Therefore, later this year we will release 1.09. Version 1.10 is planned for TeXlive. We hope that ffi works ok on intel and arm platforms at that point. (6) There have been some extensions to the Lua libraries and some callbacks have been added. Also, a few new primitives have been introduced. The documentation mentions the stable extensions. (7) There are the usual bug fixes and cleanups but there have been no real fundamental changes in the API. The LuaTeX team

2 5

attachments in PDF/A-3
by Pablo Rodriguez 22 Apr '19

22 Apr '19

Dear list, my sample to add attachments to a PDF/A-3 valid document is the following: \setuptagging[state=start] \setupbodyfont[30pt] \setupbackend [format=PDF/A-3a, intent=sRGB IEC61966-2.1, profile={sRGB.icc,default_gray.icc}, level=0] \setupcolors[pagecolormodel=auto] \setupinteraction[state=start] \starttext \startTEXpage[offset=1em] an attachment\attachment[file=xml-mkiv.pdf] \stopTEXpage \stoptext There are five reported errors when tested with the latest development version of veraPDF (http://downloads.verapdf.org/dev/verapdf-installer.zip) - Annotation should have /F value (https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-an…) unless their Rect key value 1 equal to value 3 and value 2 equal to value 4, or the annotation subtype is /Popup or /Link. - Although not reported, the /F value should conform these considerations: If present, the F key's Print flag bit shall be set to 1 and its Hidden, Invisible, ToggleNoView, and NoView flag bits shall be set to 0. https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-an… - Annotations need an appearance dictionary (https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-an…) unless the same exception for the /F value apply. - The /EmbeddedFile dictionary should specify the MIME type in its /Subtype entry (https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-an…) - The /AFRelationship key is missing from the /Filespec dictionary (https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-an…) Possible values are: Source, Data, Alternative, Supplement, EncryptedPayload, FormData, Schema or Unspecified (from https://www.pdfa.org/wp-content/uploads/2018/10/PDF20_AN002-AF.pdf) - The /Filespec lacks association with the PDF document or any of its parts, such as pages (https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-an…) From https://www.pdfa.org/wp-content/uploads/2018/10/PDF20_AN002-AF.pdf, it seems that either the /Catalog or a /Page dictionary (there are other ones, but I would limit attachments in ConTeXt to those two [if not to the /Catalog itself only]) should contain an /AF entry with the reference to the /Filespec object(s). I assume that the value type for the /AF entry is an array of one or multiple object references. These are all the issues veraPDF finds when validating the PDF document generated from the source above. I hope it helps. Many thanks for your help, Pablo -- http://www.ousia.tk

3 12

two proposals for attachments in PDF/A-3
by Pablo Rodriguez 25 Mar '19

25 Mar '19

Hans, I realized that the values for the /AFRelationship key that I provided in a previous message, are the ones defined for PDF-2.0 (Source, Data, Alternative, Supplement, EncryptedPayload, FormData, Schema or Unspecified). According to https://www.loc.gov/preservation/digital/formats/fdd/fdd000360.shtml, values for the /AFRelationShip key in PDF/A-3 are only: Source, Data, Alternative, Supplement, and Unspecified. If you allow me a suggestion, maybe it would be useful to have two new options in the \setupattachment command: relationship = source data alternative supplement unspecified association = document page The default values could be document and unspecified. The user should know what to do when changing these defaults. Of course, the /AF entry can be placed in other PDF objects, but document and page are enough options to start with. Many thanks for your help, Pablo -- http://www.ousia.tk

2 2

proposal for attachments (not restricted to PDF/A)
by Pablo Rodriguez 25 Mar '19

25 Mar '19

Hans, I think it would be great to add to all attachments (whether the file is PDF/A or not), the following information in /EmbeddedFile, /Params dictionary (as explained table 46 from page 104 from the PDF spec [https://www.adobe.com/content/dam/acom/en/devnet/pdf/PDF32000_2008.pdf#name…] the following entries: - /Size - /ModDate - /Subtype with MIME (as already reported). Many thanks for your help, Pablo -- http://www.ousia.tk

2 2

comment for attachments in PDF/A-3
by Pablo Rodriguez 24 Mar '19

24 Mar '19

Hans, I have other comments for embedded files, but I need more time to compose them. Right now I would like to comment an issue with the following source: \setupinteraction[state=start] \starttext \startTEXpage[offset=1em] \attachment[/home/ousia/xml-mkiv.pdf] [name=new-name.pdf, title=Title, subtitle=Subtitle, method=hidden, author=author] \stopTEXpage \stoptext If method=hidden, a /Names dictionary is added, with the following content: 9 0 obj << /Names [ (/home/ousia/xml-mkiv.pdf) 2 0 R ] >> endobj In some scenarios, this could be a security issue. Wouldn’t it be possible that the content of the /Names entries would be replaced by the option keys title or name from \attachment? Many thanks for your help, Pablo -- http://www.ousia.tk

3 5

typo-brk.lua
by Wolfgang Schuster 22 Mar '19

22 Mar '19

Hi, a local definition for numbers has to be added to get language dependant settings to \definebreakpoint. function breakpoints.handler(head) local done = false local attr = nil local map = nil local current = head while current do local char, id = isglyph(current) if char then -- local a = getattr(current,a_breakpoints) local a = takeattr(current,a_breakpoints) if a and a > 0 then if a ~= attr then local data = mapping[a] if data then map = data.characters else map = nil end attr = a end if map then local cmap = map[char] if cmap then -- setattr(current,a_breakpoints,unsetvalue) -- should not be needed -- for now we collect but when found ok we can move the handler here -- although it saves nothing in terms of performance local lang = getlang(current) + local numbers = languages.numbers local smap = lang and lang >= 0 and lang < 0x7FFF and (cmap[numbers[lang]] or cmap[""]) if smap then Wolfgang

1 0

publ-imp-commands.mkvi
by Wolfgang Schuster 15 Mar '19

15 Mar '19

Hi, the following change is needed in the publication file \let\<< -\let\<> +\let\>> because the wrong assignment creates a wrong bracket in math mode for left/right delimiters. \starttext \m { \left\< x \right\> } \m { \left\> x \right\< } \stoptext Wolfgang

2 1

Argument of \setupbtx[command=...] appears twice
by Wolfgang Schuster 15 Mar '19

15 Mar '19

Hi Hans and Alan, the argument of the command key for the \setupbtx command is shown twice in the running text. \usebtxdataset[mkiv-publications.bib] \setupbtx[command=\groupedcommand{<}{>}] \starttext \cite[article] \placelistofpublications \stoptext A possible fix for this is to change the name of one instance (publ-ini.mkiv) where the key is used from command to textcommand. \def\publ_cite_handle_variant_indeed[#1]% {\letbtxparameter\c!alternative\currentbtxcitealternative \edef\currentbtxreference{#1}% \saverunningstyleandcolor \usebtxstyleandcolor\c!style\c!color \uselanguageparameter\btxdatasetparameter % new \btxparameter\c!left - \btxparameter\c!command{\dobtxcitevariantblob}% {\publ_cite_handle_variant_blob}% + \btxparameter\c!textcommand{\dobtxcitevariantblob}% {\publ_cite_handle_variant_blob}% \btxparameter\c!right \endgroup} Wolfgang

1 0

attachments with PDF/A-3
by Pablo Rodriguez 13 Mar '19

13 Mar '19

Dear list, I have generated a PDF/A-3 compilant document, but as I add attachments the validation from veraPDF warns about errors. There are five issues, which I can document here. Sorry, but I’m afraid I cannot provide patches. Can we discuss these issues now, or is it better to wait until TeX Live 2019 has been released? Many thanks for your help, Pablo -- http://www.ousia.tk

2 2