Cleanups for issue # 499

Author: marksem

docs/ReleaseNotes.md

@@ -4,6 +4,10 @@ gist Release Notes
 Release X.x.x
 -----
 
+### Major Updates
+
+- Remodeled times to use datatype properties rather than TimeInstant, per issue [#499](https://github.com/semanticarts/gist/issues/499).
+
 ### Minor Updates
 
 - Improved definitions for 'navigational' predicates, per issue [#523](https://github.com/semanticarts/gist/issues/523).

gistCore.ttl

@@ -1,4 +1,3 @@
-@prefix : <https://ontologies.semanticarts.com/o/gistCore#> .
 @prefix gist: <https://ontologies.semanticarts.com/gist/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@@ -11,25 +10,10 @@
 	a owl:Ontology ;
 	owl:versionIRI <https://ontologies.semanticarts.com/o/gistCoreX.x.x> ;
 	skos:definition "gist is a minimalist upper ontology created by Semantic Arts"^^xsd:string ;
+	skos:prefLabel "gist Core"^^xsd:string ;
 	gist:license "https://creativecommons.org/licenses/by-sa/3.0/"^^xsd:string ;
 	.
 
-skos:definition
-	a owl:AnnotationProperty ;
-	.
-
-skos:example
-	a owl:AnnotationProperty ;
-	.
-
-skos:prefLabel
-	a owl:AnnotationProperty ;
-	.
-
-skos:scopeNote
-	a owl:AnnotationProperty ;
-	.
-
 gist:Account
 	a owl:Class ;
 	owl:equivalentClass [