This brings up an additional aspect of the versioning problem.
I'm pretty certain the nature, granularity, and meaning of versioning
will differ between the TBox and the ABox - at least that's my sense
of things and the way we've been proceeding on BIRNLex. What I mean
by that is I have a pretty good sense of what an appropriate
versioning policy is for the TBox. In our work on BIRNLex - and even
more so in the work the OBI group has been doing, as well as work
from the GO Consortium and the NCI Thesaurus - an effort to define a
set of AnnotationProperties to handle versioning in the TBox is being
assembled and put to use.
I'm not at all certain what versioning means in the ABox apart from
the sort of versioning one would apply to all identified resources
such as that provided via LSID, which as we all know here has its
pros and cons.
Just my $0.02 on this issue.
Cheers,
Bill
On Jan 11, 2007, at 4:28 PM, 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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