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?
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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