There is a LuaLaTeX-package "selnolig" to achieve this goal. Its wordlists and rules could probably be adapted. There is also a thorough discussion of this challenge in the documentation. https://www.ctan.org/pkg/selnolig Best regards, Florian ____________________________________________ Florian Grammel Copenhagen, Denmark

Am 27.09.2017 um 22:25 schrieb Henning Hraban Ramm:

Am 2017-09-27 um 15:39 schrieb Thomas A. Schmitz :

...

On 09/27/2017 02:16 PM, Thomas Widmann wrote:

...

That's a nice idea. If something like that existed, it could be used to change 's' to 'ſ' in relevant places, too.

This exists, see here: https://www.mail-archive.com/ntg-context@ntg.nl/msg79381.html

Thank you for the suggestion. I tried

\replaceword[eka][Auflage][Au{fl}age] \setreplacements[eka]

and even converted the german wordlist from the selnolig package, but it doesn’t help. If I try \replaceword[eka][Auflage][Au\noligature{fl}age] I get a literal "Au noligature fl age" in my text.

Simply Au\noligature{fl}age doesn’t help either.

My active features are: \definefontfeature[default] [mode=node,liga=yes,kern=yes,tlig=yes, ccmp=yes,language=dflt, protrusion=quality, expansion=quality]

\definefontfeature[default] [mode=node,liga=yes,kern=yes,tlig=yes, ccmp=yes,language=dflt, protrusion=quality, expansion=quality] \replaceword[eka][Auflage][Au{fl}age] \starttext Auflage Au\noligature{fl}age \setreplacements[eka] Auflage \stoptext no problem here, first with ligature the other two without Herbert

Greetlings, Hraban --- http://www.fiee.net http://wiki.contextgarden.net GPG Key ID 1C9B22FD

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On 09/27/2017 10:25 PM, Henning Hraban Ramm wrote:

Thank you for the suggestion. I tried

\replaceword[eka][Auflage][Au{fl}age] \setreplacements[eka]

and even converted the german wordlist from the selnolig package, but it doesn’t help.

Works here. You'll have to make a real example. Thomas

On 9/27/2017 5:53 PM, Ulrike Fischer wrote:

Am Wed, 27 Sep 2017 15:10:33 +0200 schrieb Tomas Hala:

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From this point of view, Auf{}lage seems better.

This doesn't prevent the ligature:

\starttext

Auflage Auf{}lage Auf\/lage

\stoptext

This also documented: "The most important change is that adding a brace group in the middle of a word (like in of{}fice) does not prevent ligature creation."

With pdftex it does avoid ligatures, but not reliably. There are cases where the brace group disappear when pdftex tries out hyphenation points. in traditional tex hyphenation is integrated in the par builder which comes after ligaturing and kerning and tex only hyphenated where it 'makes sense' and in the process (multi-pass, going into disc nodes) it will consult (deconstruct / reconstruct) ligatures and at that point it's not known that the input had a {}. Tricks like inserting something in between is also unreliable when done at the wrong time and it can also prevent for instance kerns of hyphenation.

Anyway, in addition to Thomas answer ... we already have this \blockligatures[fi,ff] \blockligatures[fl] \blockligatures[u:fl:age] \definefontfeature[default:nolig][default][blockligatures=yes] \startTEXpage[offset=1em] \definedfont[Serif*default:nolig] fi ff fl auflage \definedfont[Serif*default] fi ff fl auflage \stopTEXpage The \blockligatures[u:fl:age] is new and something of a joke experiment ... I can probably come up with a real advanced and robust mechanism if motivated enough Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

On 09/27/2017 10:27 PM, Henning Hraban Ramm wrote:

Am 2017-09-27 um 18:13 schrieb Hans Hagen :

...

[...] The \blockligatures[u:fl:age] is new and something of a joke experiment ... I can probably come up with a real advanced and robust mechanism if motivated enough

Thank you, I tried it, and while blocking ligatures generally works (\blockligatures[fl]), the selective blocking (\blockligatures[u:fl:age]) doesn’t change anything. Do you have this only in your local version?

Hi Hraban, using latest beta (from 2017.09.25 19:19), the following sample works: \starttext \blockligatures[fi,ff] \blockligatures[fl] \blockligatures[u:fl:age, u:fl:eg] \definefontfeature[default:b][default][blockligatures=yes] \setupbodyfont[times]\showfontkerns \startTEXpage[offset=1em] fi ff fl Auflage auflegt \definedfont[Serif*default:b] fi ff fl Auflage auflegt \stopTEXpage \stoptext Just in case it helps, Pablo -- http://www.ousia.tk

On 09/28/2017 09:17 AM, Herbert Voss wrote:

Am 28.09.2017 um 08:40 schrieb Pablo Rodriguez:

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using latest beta (from 2017.09.25 19:19), the following sample works: [...] How do you catch "Aufl." (the abbreviation of Auflage), which is written _with_ a ligature?

Herbert, I overlooked that \blockligatures[u:fl:age, u:fl:eg] only works if there is also a \blockligatures[fl]. Hans, is this a bug or is it intended? Pablo -- http://www.ousia.tk

On 09/28/2017 03:54 PM, Hans Hagen wrote:

On 9/28/2017 1:51 PM, Pablo Rodriguez wrote:

...

[...] I overlooked that \blockligatures[u:fl:age, u:fl:eg] only works if there is also a \blockligatures[fl].

Hans, is this a bug or is it intended? do you indeed use the latest beta? anyway, the \replaceword mechanism is a bit more flexible and efficient

Hans, after updating to latest beta (from 2017.09.25 19:19 to 2017.09.28 10:07 [I didn’t realize that there was a newer beta yesterday]), it works. Just in case it may be relevant, \blockligatures[u:fl:age] blocks ligatures in auflegt and Aufl. Minimal sample: \starttext \blockligatures[u:fl:age] \definefontfeature[default:b][default][blockligatures=yes] \setupbodyfont[times]\showfontkerns \startTEXpage[offset=1em] fl Auflage auflegt Aufl. \definedfont[Serif*default:b] fl Auflage auflegt Aufl. \stopTEXpage \stoptext Pablo -- http://www.ousia.tk