I'm studying Word's hyphenation, and find there is very little documentation about how it works behind the curtain.
When hyphenation is turned on, how does Word make the decision about where to place the hyphen? A few things can be controlled (the width of the zone, whether or not to hyphenate a word in caps, and the number of successive hyphens), but apart from those, how does Word know where to put the break?
Does it refer to the spelling dictionary (which could contain recommended hyphenation points) or perhaps there are some rudimentary algorithms (allow a hyphen after "re", break only next to a vowel, etc.)?
On older systems such as the GEM version of Ventura Publisher and Xywrite, for example, the quality of the hyphenation logic was a major feature that attracted professional users. But now, the typical document that one sees has hyphenation turned off , and when it is on the quality of the breaks is often poor. Are there third party addins that address hyphenation?