RE: Versioning vs Temporal modeling of Patient State

> I need to go, but just want to quickly add another biological example
> that involves DNA sequences (instances of the Sequence class) that have
> been submitted to GenBank. GenBank uses version numbers to keep track of
> the submissions by the same or different labs of the same reference
> sequence. Again, version to a biologist may not be the same as version
> to a computer scientist. What is the context of version?

[VK] I think the last statement is key to this debate. I would model the above
as "source" information associated with each sequence. This in some sense
buttresses my point that content-management notion of versioning doesn't apply
to instances. If we look at the various use cases, it turns out that a rigorous
modeling of information will eliminate the need for versioning.

---Vipul

> 
> Cheers,
> 
> -Kei
> 
>   Kashyap, Vipul wrote:
> 
> >Nigam,
> >
> >This is an interesting example...
> >
> >
> >
> >>Have an example for this one: If the instance is of a the class "Tumor"
> >>then
> >>on giving treatment it changes in size, shape etc, and might ultimately
> >>disappear. On each visit we are observing a different version of the
> tumor
> >>instance [in Tom].
> >>
> >>
> >
> >[VK] Clearly there is a longitudinal aspect to this as the state of the
> tumor
> >changes over time....
> >
> >This could be modeled in two ways:
> >
> >Tumor1.state = X at time T1
> >Tumor1.state = Y at time T2
> >...
> >Tumor1.state = "Non-existent" at time Tn
> >
> >Essentially you are modeling state as a multivalued property or as a
> ternary
> >relationship (Tumor, state, Time)
> >
> >Alternatively,
> >
> >Tumor1, v1.state = X
> >Tumor1, v2.state = Y
> >...
> >Tumor1, vN.state = "Non-existent"
> >
> >
> >IMHO, the former representation conveys more information and meaning...
> >So, it may make sense not to confound versioning with temporal
> progression...
> >
> >Look forward to the commounities thoughts on the issue.
> >
> >Cheers,
> >
> >---Vipul
> >
> >
> >
> >
> >
> >
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> >
> >
> >
> >
> 





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Received on Friday, 12 January 2007 00:42:18 UTC