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These things are often called name, container and value. Your diagram has them neatly put in columns:

Name Container Value +--------+ Alias: | $alias | ------------+ +--------+ | | \|/ +--------+ +----------+ +---------+ Variable: | $var | ----> | Variable | ----> | Content | +--------+ +----------+ +---------+ /|\ +--------+ +--------+ +----------+ | Reference: | $ref | ----> | Variable | --+ +--------+ +----------+
The "variable" label isn't accurate, though, if you also call one of the blocks "variable". And, to more clearly illustrate that an alias is absolutely not a reference, you could consider making the original name and the second name more visually equal:
+--------+ __ | $name | \ +--------+ \ +-----------+ +-------+ ====> | container | ----> | value | +--------+ / +-----------+ +-------+ | $alias | __/ +--------+
And I think the content/value part of Reference is missing in your diagram. It does have one, and that is the actual reference! Hard to draw, though.

Juerd # { site => '', plp_site => '', do_not_use => 'spamtrap' }

In reply to Re^2: The Concept of References by Juerd
in thread The Concept of References by leriksen

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