Some note on components
- lifter : descriptive functions - a bit of user friendly Prolog
- dirtree : a declarative interface to file system (xml at work), and a bit of ftp
- lag : linear aggregation - just a sketch by now, showing how efficient aggregation can be performed in Prolog
About lifter, I can't resist...
here is part of a comment from SWI-Prolog mailing list (original list no more available, see http://swi-prolog.996271.n3.nabble.com/Renaming-map-dict-class-type-tp13585p13742.html),
explaining what lifter is.
From the very first lifter' users:
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With lifter, the clause
longer(A,B) :-
length(A,º) > length(B,º).
is expanded to
longer(A, B) :-
length(A, C),
length(B, D),
C > D.
I like that this approach satisfies the desire for expressions that "evaluate in place" but keeps the flexibility and potent, multi-directional functionality of prolog relations.
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License LGPL 2.1 Author Capelli Carlo