Expert.js Quick Start

var expert = require('expert'), _ = require('underscore'); var domain = expert.Domain(), Concept = domain.Concept, Relation = domain.Relation, 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, example = domain.example, 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) .biggerThan(mouse) .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 that a mouse is smaller than, can swim?"); var answer2 = _.intersection( example(mammal), whatCan(swim), smallerThan(mouse) ); console.log(_.map( answer2, function(c){ return c.id; }));