Big thanks for the links. Re. my question, is it doable to aggregate? Does
it make sense to agregate in LP at all?

Daniel
On Apr 27, 2012 4:30 PM, "David Nolen" <dnolen.li...@gmail.com> wrote:

> Might I suggest a good book on Prolog?
>
>
> http://www.amazon.com/Prolog-Programming-Artificial-Intelligence-Bratko/dp/0201403757
> http://www.amazon.com/The-Art-Prolog-Second-Edition/dp/0262193388
>
> I also recommend close readings of The Reasoned Schemer and Byrd's
> dissertation - both are linked to in core.logic README.
>
> David
>
> On Friday, April 27, 2012, Daniel Kwiecinski wrote:
>
>> Lets say we have child - father and child - mother relationship and
>> derive from it child - parent relationship (via goal) . In clojure logic I
>> can create goals which can answer questions like: children-of,
>> grandchildren-of, all-descendants-of, all-ancestors-of  very easily.
>> But how one create goals that let answer questions such as:
>> grandchildren-count-of, length-of-ancestors-line, grandparents-count
>>
>> Kind Regards,
>> Daniel Kwiecinski
>> lambder.com
>>
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