Re: line-breaking and hyphenation in XSL-FO

Thank you all for the comments on my questions..

Regards,
Mukul

--- David Tolpin <dvd@xxxxxxxxxxx> wrote:
> > TeX is a program system for typesetting, and it
> broke many
> > new grounds in computer typesetting, in particular
> the
> > paragraph filling and the hyphenation algorithms
> developed
> > for TeX are still the best for their respective
> purposes.
> 
> Unfortunately, this is not so. While TeX's line
> breaking algorithm
> is good, TeX's hyphenation algorithm (Liang's
> algorithm) is
> a rather simple approach imposing serious
> limitations on proper
> hyphenation of German, for example. 
> 
> The most important advantage of Liang's algorithm is
> that it is
> fast and simple. That's why many implementations of
> XSL FO use it.
> 
> > XSLFO leaves many details for the implementation,
> sometimes
> > this is made explicit, often this can be guessed
> from the
> > absence of any advice. Hyphenation is explicitely
> left to
> > the implementation, line breaking implicitely
> (they could
> > have mentioned TR14 though, given the extensive
> reference
> > to TR9).
> 
> UA14 for line-breaking and Liang's for computing
> hyphenation
> points has little to do with the actual
> line-breaking algorithm,
> that is with optimal distribution of syllables
> between lines in 
> a paragraph.
> 
> Hyphenation dictionaries and UA14 specify where it
> is allowed to
> break a word or a line.
> 
> A line-breaking algorithm is a way to determine the
> actual breakdown.
> While it should be based on something like
> hyphenation tables and UA14,
> it is much more than that.
> 
> When TeX's line breaking algorithm is mentioned, it
> is the sophistication
> of optimization that is praised, not conformance to
> a standard. Actually,
> TeX knows nothing about Unicode and UA14.
> 
> 
> David Tolpin
> 
>  XSL-List info and archive: 
> http://www.mulberrytech.com/xsl/xsl-list
> 


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