Closed sgillesp-ai closed 3 years ago
Thank you for finding a bug in Figure 7.7 (p172). The arrow from the Employment
instance to the Person
instance (me) should have been called employmentOf
. This was a copy-and-paste-and-forget-to-edit error.
Need your help, please. Could you explain the arrows in the lower portion of Figure 7.7 which illustrate, “Michael Uschold was employed at Boeing from 1997-2008.”
Both arrows going from :Employment (going to both :Organization and Person) are identical; they use the property :employmentBy.
But, it seems like the arrows describe a different relationship. Wouldn’t the relationship going from :Employment to the :Organization (:_Boeing) be different than the relationship going from :Employment to the Person (:_MichaelUschold)?
Maybe the property arrow going from :Employment (:_MU_EmployedByBoeing) to the :Organization should be :employedBy? This was the period MU was employed by Boeing. This was the period of employment by Michael Uschold.
Sorry if this is in the weeds and sorry it's late.