Sometimes you just have to go to the source. The Ref. Manual didn't seem to
have it either.
>From the UML Spec, Paragraph 3.43.2
A multiplicity specification is shown as a text string comprising a
comma-separated sequence
of integer intervals, where an interval represents a (possibly infinite)
range of integers, in the
format:
lower-bound .. upper-bound
where lower-bound and upper-bound are literal integer values, specifying the
closed (inclusive)
range of integers from the lower bound to the upper bound. In addition, the
star character (*)
may be used for the upper bound, denoting an unlimited upper bound. In a
parameterized
context (such as a template), the bounds could be expressions but they must
evaluate to literal
integer values for any actual use. Unbound expressions that do not evaluate
to literal integer
values are not permitted.
If a single integer value is specified, then the integer range contains the
single integer value.
If the multiplicity specification comprises a single star (*), then it
denotes the unlimited
nonnegative integer range, that is, it is equivalent to 0..* (zero or more).
A multiplicity of 0..0 is meaningless as it would indicate that no instances
can occur.
J.D.
My ideas, my words. You can't blame anyone that might employ me for them.
-----Original Message-----
From: george brown [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 21, 2000 2:26 PM
To: [EMAIL PROTECTED]
Subject: (ROSE) * Cardinality
Hi,
I couldn't find any info on the following in the UML user guide. Could
someone explain that to me, please?
What is the difference between a multiplicity of (1..*) or (0..*) and (*)?
What does exactly a (*) cardinality mean?
Thanks,
George
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