@ symboly pred uhlom v package.json pre úhlové Quickstart [duplicate] - angularjs, npm, angular

Snažím sa zistiť, prečo uhlový 2 rýchly štart odporúča súbor package.json:

{
"name": "angular2-quickstart",
"version": "1.0.0",
"scripts": {
"start": "tsc && concurrently "npm run tsc:w" "npm run lite" ",
"lite": "lite-server",
"postinstall": "typings install",
"tsc": "tsc",
"tsc:w": "tsc -w",
"typings": "typings"
},
"license": "ISC",
"dependencies": {
"@angular/common":  "2.0.0-rc.1",
"@angular/compiler":  "2.0.0-rc.1",
"@angular/core":  "2.0.0-rc.1",
"@angular/http":  "2.0.0-rc.1",
"@angular/platform-browser":  "2.0.0-rc.1",
"@angular/platform-browser-dynamic":  "2.0.0-rc.1",
"@angular/router":  "2.0.0-rc.1",
"@angular/router-deprecated":  "2.0.0-rc.1",
"@angular/upgrade":  "2.0.0-rc.1",
"systemjs": "0.19.27",
"es6-shim": "^0.35.0",
"reflect-metadata": "^0.1.3",
"rxjs": "5.0.0-beta.6",
"zone.js": "^0.6.12",
"angular2-in-memory-web-api": "0.0.7",
"bootstrap": "^3.3.6"
},
"devDependencies": {
"concurrently": "^2.0.0",
"lite-server": "^2.2.0",
"typescript": "^1.8.10",
"typings":"^0.8.1"
}
}

Prečo sú všetky tieto @ značky pred uhlom .. Tieto balíky don "t nainštalovať a don" t existujú v VS2015 ..

odpovede:

V prípade verzií Angular2 pre RC (release kandidátov) bol koreňový menný priestor balíkov / modulov premenovaný z angular2 na @angular.

Ak používate beta verzie, použite angular2 ale ak sú verzie RC, použite @angular.

Všimnite si, že dokument na angular.io sa spolieha na najnovšiu verziu, RC.