expert

Expert.js
=========
Expert.js is miniature semantic network framework written in JavaScript.

Motivation
----------
Representing knowledge for artificial intelligence applications can be simplified
by the flexibility of scripting languages. Expert.js provides a DSL-like constructs
for building semantic networks. The result is a readable, easy to work with code.

Quick Example
-------------
``javascript
var expert = require('expert'),
_ = require('underscore');

var domain = expert.Domain();
var Concept = domain.Concept;
var Relation = domain.Relation;

var mammal = Concept.create({id:"mammal"}),
fish = Concept.create({id:"fish"}),
dog = Concept.create({id:"dog"}),
cat = Concept.create({id:"cat"}),
mouse = Concept.create({id:"mouse"}),
whale = Concept.create({id:"whale"}),
salmon = Concept.create({id:"salmon"}),

fur = Concept.create({id:"fur"}),
bark = Concept.create({id:"bark"}),
swim = Concept.create({id:"swim"}),

isa = domain.isa,
kindOf = domain.kindOf,

has = Relation.create({id:"has"}),
whatHas = Relation.create({id:"what has",inverseFor:has}),

can = Relation.create({id:"can"}),
whatCan = Relation.create({id:"what can",inverseFor:can}),

biggerThan = Relation.create({id:"biggerThan",isTransitive: true});
smallerThan = Relation.create({id:"smallerThan",isTransitive: true,
inverseFor:biggerThan});

salmon
.isa(fish)
.can(swim);

whale
.isa(mammal)
.biggerThan(dog)
.biggerThan(cat)
.can(swim);

dog
.isa(mammal)
.has(fur)
.can(bark)
.biggerThan(mouse);

cat
.isa(mammal)
.has(fur)
.biggerThan(mouse);

mouse
.isa(mammal)
.has(fur);

console.log("what has fur?");
var answer1 = whatHas(fur);
console.log(_.map( answer1, function(c){ return c.id; }));

console.log("what mammal is bigger than a mouse and can swim?");
var answer2 = _.intersection( kindOf(mammal), whatCan(swim),smallerThan(mouse));
console.log(_.map( answer2, function(c){ return c.id; }));

``