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Can any one describe this figure ?

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Its just a different representation for representing the cardinality.

Here 0..* represents 0 or more.

1..1 represents 1.

So it is n:1 representation .
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i think.. this is min. and max. cardinality....

0...* means all instructor need not have a student(0) and one instructor is allowed to be advisor of multiple students (*)...

1..1 means every student must have an advisor(1) and exactly one advisor.(1). ???

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