exceptions for hyphenation

["bodo@tanzerei.com" <bo...@tanzerei.com>]

  Hi,
since Fops hyphenation algorithm (borrowed from TeX, right?) seems to be 
not working perfect, i wonder whether there is a possiblility to define 
exceptions:
Example : the german word "Blumentopferde" would be hypenated to 
"Blu-men-top-ferde" which is not correct.
In TeX one could define an exceptionlist for such words.
Is this possible in fop too?
Or  - if not - is somebody thinking about implementing this in Fop ?


Bodo Teichmann


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Re: exceptions for hyphenation

[Carlos Villegas <ca...@uniscope.co.jp>]

bodo@tanzerei.com wrote:

>  Hi,
> since Fops hyphenation algorithm (borrowed from TeX, right?) seems to 
> be not working perfect, i wonder whether there is a possiblility to 
> define exceptions:
> Example : the german word "Blumentopferde" would be hypenated to 
> "Blu-men-top-ferde" which is not correct.
> In TeX one could define an exceptionlist for such words.
> Is this possible in fop too?
> Or  - if not - is somebody thinking about implementing this in Fop ? 

FOP's hyphenation algorithm should produce the same results as TeX. If 
it doesn't, there's some error in FOP's implementation.  Exceptions are 
supported in FOP version, there's a 'exceptions' tag in the hyphenation 
DTD used for the pattern files. However, currently it has to be 
specified in the pattern file and FOP will only use one pattern file per 
language. If you specify a different one in the  user configuration, FOP 
will use that instead. So the current way to change the exceptions list 
is to copy the supplied hyphenation file for your language and 
add/replace them.
It's been my intention to add support so that you could give only an 
exception list and FOP will merge it with the base pattern file for a 
language in a given run. It's also possible to add some extension 
property or FO to add hyphentation exceptions in the xsl:fo input file, 
so you can add them to the stylesheet more like TeX.
However, I haven't had the time and nobody asked until now. For german, 
there's also a hyphen tag to allow you to specify exceptions for words 
that change spelling when hyphenated, for example, backen hyphenates to 
bak-ken in traditional german and you could specify it in the pattern 
file as ba<hyphen pre="k" no="c">ken, however, this doesn't work in 
FOP's version. That was also in my things to do list.
I guess since somebody asked, I should go back and fix these things! 
I'll take a look.

Carlos


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> Bodo Teichmann
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