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KGConf / BookClub-Designing-BuildingEnterpriseKG

This is the Github Repository for the Knowledge Graph Conference Book Club around the book " Designing and Building Enterprise Knowledge Graphs: Synthesis Lectures on Data, Semantics, and Knowledge" with Juan Sequeda and Ora Lassila
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Modeling Time #17

Closed eldredgeb closed 2 years ago

eldredgeb commented 2 years ago

In Example 3.4, the start timestamp of an event is modeled as a Relationship Attribute of the "placedBy" edge connecting the Concept "Order" to the Concept "Customer." Later, different dates are modeled as Concept Attributes of the Concept "Customer." It seems like the approach to handling time, given its central role in many / most business analyses, is a key decision in modeling. It also seems to me that modeling at least Date if not Time (or subsets of time) as well as a Concept would offer a tremendous opportunity for conformance of format and thus queriability. Are there best practices around modeling time?

juansequeda commented 2 years ago

It depends :)

The issue is that time isn't first class citizen of the data model. Therefore it ends up being a modeling question.

Important read: https://martinfowler.com/articles/bitemporal-history.html Also take a look at Time Ontology: https://www.w3.org/TR/owl-time/

rdfguy commented 2 years ago

One of my favorites: https://www.sciencedirect.com/science/article/abs/pii/0004370287900610

msesboue commented 2 years ago

Answered during session 4