Hyphenation exceptions

While TeX's hyphenation rules are good, they're not infallible: you will occasionally find words TeX just gets wrong. So for example, TeX's default hyphenation rules (for American English) don't know the word “manuscript”, and since it's a long word you may find you need to hyphenate it. You can “write the hyphenation out” each time you use the word:

... man\-u\-script ...

Here, each of the \- commands is converted to a hyphenated break, if (and only if) necessary.

That technique can rapidly become tedious: you'll probably only accept it if there are no more than one or two wrongly-hyphenated words in your document. The alternative is to set up hyphenations in the document preamble. To do that, for the hyphenation above, you would write:


and the hyphenation would be set for the whole document. Barbara Beeton publishes articles containing lists of these “hyphenation exceptions”, in TUGboat; the hyphenation “man-u-script” comes from one of those articles.

The complete list of hyphenation exceptions, to date, is maintained on CTAN.

If you prefer reading the articles, here is the list:

Year TUGboat issue
2018 39(2):152
2018 39(1):5–6
2015 36(1):5
2013 34(2):113–114
2012 33(1):5–6
2010 31(3):160
2008 29(2):239
2005 26(1):5–6
2002 23(3/4):247–248
2001 22(1/2):31–32

What if you have more than one language in your document ?

Simple: select the appropriate language, and do the same as above:


(nothing clever here: this is the “correct” hyphenation of the word, in the current tables). However, there's a problem here: just as words with accent macros in them won't break, so an \hyphenation commands with accent macros in its argument will produce an error:


tells us that the hyphenation is “improper”, and that it will be “flushed”. But, just as hyphenation of words is enabled by selecting an 8-bit font encoding, so \hyphenation commands are rendered proper again by selecting that same 8-bit font encoding. For the hyphenation patterns provided for “legacy”, the encoding is Cork, so the complete sequence is:


The same sort of performance goes for any language for which 8-bit fonts and corresponding hyphenation patterns are available. Since you have to select both the language and the font encoding to have your document typeset correctly, it should not be a great imposition to do the selections before setting up hyphenation exceptions.

Modern TeX variants (principally XeTeX and LuaTeX) use unicode, internally, and distributions that offer them also offer UTF-8-encoded patterns; since the hyphenation team do all the work “behind the scenes”, the use of Unicode hyphenation is deceptively similar to what we are used to.


3_composition/langues/cesure/nouveaux_motifs_de_cesure.txt · Dernière modification: 2021/06/28 21:51 par jejust
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