Dear Robert,
P120 belongs to Allen's logic, which is deprecated. Allen's logic
assumes exact endpoints in time, whereas P183 makes the fuzzy zone
explicit. As such, P120 only coincides with P183 if the fuzziness is
zero. Therefore, P183 is more general than P120.
Following CRMgeo, only declarative time spans can have precise endpoints
in time. In reality, they occur in plans, administrational decisions,
artificial constraints of focus and queries.
Since Allen's terms are useful for archaeology, but not with exact
endpoints in time, the respective terms should be reintroduced in
CRMarcheo extended by fuzzy boundaries.
Indeed, transitivity was not mentioned explicitly and should be added in
the scope note (issue!)
All the best,
Martin
On 7/15/2019 7:55 PM, Robert Sanderson wrote:
Dear all,
The diagrams in the newer temporal properties as to how temporal spans
A and B relate are enormously useful in understanding the distinctions
between them.
The question that we ran into was the distinction between P120 occurs
before and P182 / P183, and which one to use. In particular, we could
not distinguish between P120 and its super property, P183.
Both imply some minimal temporal gap between the end of the first and
the beginning of the second. Both position the entities temporally in
the same order. Perhaps more importantly, between P182 (End of A is
less than or equal to the start of B) and P183 (End of A is less than
start of B), it seems like there are no other possibilities?
Indeed, P183 corresponds to Allen’s {before}, as does P120. P183 does
not directly assert that it is transitive, but the temporal logic
makes it such.
If there is a difference, between the two, it would be lovely to
understand. And a diagram would be very helpful in explaining that
difference. If there isn’t a difference, it seems that P183 could be
deprecated in favor of the longer standing P120.
Many thanks!
Rob
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--
------------------------------------
Dr. Martin Doerr
Honorary Head of the
Center for Cultural Informatics
Information Systems Laboratory
Institute of Computer Science
Foundation for Research and Technology - Hellas (FORTH)
N.Plastira 100, Vassilika Vouton,
GR70013 Heraklion,Crete,Greece
Vox:+30(2810)391625
Email:[email protected]
Web-site:http://www.ics.forth.gr/isl
--
------------------------------------
Dr. Martin Doerr
Honorary Head of the
Center for Cultural Informatics
Information Systems Laboratory
Institute of Computer Science
Foundation for Research and Technology - Hellas (FORTH)
N.Plastira 100, Vassilika Vouton,
GR70013 Heraklion,Crete,Greece
Vox:+30(2810)391625
Email: [email protected]
Web-site: http://www.ics.forth.gr/isl
