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

Yup agreed thanks all of you :)

--- In [email protected], Jörgen Andersson <jorgen.x.andersson@...> wrote:
>
> 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
> > >>
> > >>
> > >
> > >
> >
>




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