Re: Re: How to identify if a concept should be represented as a entity or as a value obj

Yes, you can say that.
I would say, an entity is a domain object where you care for its identity.
A value object is where you care only for its values.
However, an entity in one context might be a value object in another, so
there are no one-size-fits-all.
Jörgen
 **


Point taken.

Could we say that a Value object would never hold a reference to an entity ?

A Value Object would always be composed of other value objects ?

--- In [email protected], Giacomo Tesio wrote:
>
> I model entities after the expert's language, when he talks with his own
> peers he use a name to identify an entity while he describes value
objects.
>
> For example, in a financial application he could use the RIC or the ISIN
to
> identify an entity, but he doesn't identify a monetary amount.
>
>
> Giacomo
>
>
>
> On Mon, Feb 25, 2013 at 5:58 AM, Remy Fannader wrote:
>
> > **
> >
> >
> > Entities have a life-cycle of their own while the life-cycle of VOs is
set
> > by their use.
> > That means that entities can identified independently and accessed by
> > unknown applications.
> >
> >
http://caminao.wordpress.com/how-to-represent-objects-and-activities/identities-2/identities/
> > Remy.
> >
> > On 25 February 2013 06:46, sudarshan89 wrote:
> >
> >> **
> >>
> >>
> >>
> >> I am trying to find out what question one must ask during the modelling
> >> process to detect if a concept should be modeled as a entity or as a
value
> >> object.
> >>
> >> My current understanding is the below
> >>
> >> If in our domain a car engine can be swapped out and put in another car
> >> then it has existence of its own (Aggregation) and hence cannot be a
Value
> >> Object ... However in our domain if the engine cannot be swapped out
and
> >> hence makes no sense without a car then it can be modeled as a Value
Object
> >> (Composition). Does this make any sense ?
> >>
> >> Please let me know what you think
> >>
> >> Thanks
> >>
> >>
> >
> >
>