From: "M. Edward (Ed) Borasky" Date: 2008-04-07T12:05:24+09:00 Subject: Re: Arbitrary mathematical relations, not just hashes Eric Mahurin wrote: > On 4/6/08, Kelly Jones wrote: >> However, I can't easily find all items whose $color is 'red', nor all >> items whose $type is 'fruit'. In other words, color() and type() >> aren't full mathematical relations. >> > > Is there a language that handles mathematical relations naturally/natively? Prolog?