|From:||Simon Spero <ses@xxxxxxx>|
|Date:||Fri, 17 Dec 2010 11:09:31 -0500|
I would guess that the ontology in question is the CIDOC Common Reference Model (CRM), which was standardised as ISO 21227:2006. The concepts of E5 Event and E4 Period in the CRM are a little confusing.
An E4 Period is a set of "coherent phenomena or cultural manifestations" that are "bounded in time", but it is the phenomena/manifestations that define the E4 Period, not the time interval in which they occur. There is a separate class, E52 Time-Span , which represents time ranges, with start and end points. The things that are members of an E4 Period must have some unifying conceptual theme. John Doe's eating of lunch on July 27th 1942 (E5) would not be an element of The Battle of Stalingrad (E7).
he Birth of Cleopatra (E67),considered from the point of view of a 21st century museologist, can be thought of as an E5 Event and treated as if it happened instantaneously. >From the point of view of Cleopatra's mother, it probably seemed to take a lot longer, and involve much more swearing.
Note that the happening of a birth is a beginning of existence
E67 Birth ⊑ E63 Beginning of Existence ⊑ E5 Event ⊑ Temporal Entity ⊑ E1 CRM Entity
but Cleopatra's mother giving birth to Cleopatra would be an instance of an E7 Activity
E7 Activity ⊑ E5 Event ⊑ Temporal Entity ⊑ E1 CRM Entity
The creation of a Conceptual Work (E65 Creation) is defined as both an E7 Activity and an E63 Beginning of Existence.
Confusingly (to me, anyway), The Battle of Stalingrad (E7) is an E7 Activity.
On Wed, Dec 15, 2010 at 11:11 AM, Paul Hermans <paul@xxxxxxxxx> wrote:
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