@yii - framework directory.@app - base path of currently running application.@common - common directory.@frontend - frontend web application directory.@backend - backend web application directory.@console - console directory.@runtime - runtime directory of currently running web application.@vendor - Composer vendor directory.@bower - vendor directory that contains the bower packages.@npm - vendor directory that contains npm packages.@web - base URL of currently running web application.@webroot - web root directory of currently running web application.The aliases specific to the directory structure of the advanced application
(@common, @frontend, @backend, and @console) are defined in common/config/bootstrap.php.