nl_tokens: . system :: . os { . broswer { . name . version
pl_tokens: function getSystem ( cb ) { var agent = useragent . parse ( req . headers [ 'user-agent' ] ) ; var os = agent . os ; if ( ! <mask> . system ) session . system = { } ; if ( ! session . system . browser ) session . system . browser = { } ; if ( ! session . system . os ) session . system . os = { } ; session . system . browser . name = agent . family ; session . system . browser . version = agent . major + '.' + agent . minor + '.' + agent . patch ; session . system . os . name = os . family ; session . system . os . version = os . major + '.' + os . minor + '.' + os . patch ; cb ( null ) }