What do the numbers on the inputs and outputs of the blocks of the UML class diagram mean?

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Alexander Ampleev2014-01-26 12:42:58

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Alexander Ampleev, 2014-01-26 12:42:58

What do the numbers on the inputs and outputs of the blocks of the UML class diagram mean?

An arrow points from one block class to another block class. Where it exits is the number 1, where it enters it is the number 2. What do these numbers mean?

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