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On 16/10/13 12:25, Donkey Hottie wrote:
> 16.10.2013 13:55, lipska the kat kirjoitti:

<snip>

> We are managing the personnel of a company. A manager manager persons,
> not identities.
>
> A computer system is not supposed to model the liver or a soul of a
> Person, but abstracts the properties that are relevant to the task.

Well you said it.

> A Person has a manager. An Identity does not.

My local health service no longer calls people 'patients'. People who 
use the services are called unsurprisingly 'service users'

While I abhor the impersonal overtones of this particular bit management 
speak it makes perfect sense in terms of describing the entity concerned.

In the case you quote surely a manager manages Employees

or

An Employee *has a* Manager
A Manager manages one or more Employees
An Employee has one or more Roles
An Employee has an Identity (or many if you insist)
A Manager *is an* Employee
etc etc

No mention anywhere of the class *Person*

You state

'A Person may have more than one Identities' (sic)

I'd prefer 'An Employee can have one or more Roles/Identities'

A person with multiple identities doesn't really make sense does it?

How do you identify someone with multiple identities???



-- 
Lipska the KatŠ: Troll hunter, sandbox destroyer
and farscape dreamer of Aeryn Sun
GNU/Linux user #560883 - http://www.linuxcounter.net