Name Container Value +--------+ Alias: | $alias | ------------+ +--------+ | | \|/ +--------+ +----------+ +---------+ Variable: | $var | ----> | Variable | ----> | Content | +--------+ +----------+ +---------+ /|\ +--------+ +--------+ +----------+ | Reference: | $ref | ----> | Variable | --+ +--------+ +----------+ #### +--------+ __ | $name | \ +--------+ \ +-----------+ +-------+ ====> | container | ----> | value | +--------+ / +-----------+ +-------+ | $alias | __/ +--------+