[sword-devel] Comparing Verses

Jeremy Erickson jerickson314 at users.sourceforge.net
Wed Jan 18 16:40:09 MST 2006

	The code from BibleMemorizer I mentioned earlier is released under an MIT 
license.  Like I said, the algorithm is quite a bit simpler than the 
algorithm used by actual diff, but it might be good enough.  A simpler 
algorithm might also make for simpler coding to make changes.
	I'm always willing to offer the code under an alternative license if it would 
work better for Sword, should you decide to use it.

-Jeremy Erickson

> I think I might be more inclined to use a BSD licensed version of diff
> as a basis and to re-write the wdiff functionality so that we own it.
> Even if we go the GNU diff route, we might want to rewrite wdiff anyway
> since it does fairly little and could be handled better with code
> specialized to our needs. (E.g. should we necessarily present "heaven"
> vs. "heavens" as a change of a whole word? Or should we just present the
>   difference of a single character, like "heaven{+s}". You could also
> use this for orthographic variation, e.g. heaven vs. heauen (1611 KJV
> spelling) > hea{v|u}en. And we could always make this flexible and
> user-selectable.)
> But the main reason I'd prefer a BSD licensed version of diff would be
> that we actually have the potential of having all third-party code be
> BSD/MIT/Apache/LGPL. The only exception, currently, is GNU regexp, I
> believe. Once we get a replacement for that (probably by using either
> ICU's Regex functionality or a BSD version of regexp), we'll have the
> ability to permit groups to do non-GPL licensing from us (e.g. if ABS
> wanted to do a branded version of BibleCS). There are no explicit plans
> for anything like this (and, no, certainly no one has suggested making
> Sword closed-source), but it would be nice to maintain the possibility
> of having flexible licensing if we have the need.
> --Chris
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