New property-based time model. Fixes #499

docs/ReleaseNotes.md

@@ -1,24 +1,34 @@
 gist Release Notes
 =====
 
-Release X.x.x
+Release 11.0.0
 -----
 
+### Major Updates
+
+- Implemented new time model based on datatype properties rather than `TimeInstant`. Issue [#499](https://github.com/semanticarts/gist/issues/499).
+    - Deleted class `TimeInstant` and its subclasses. This class was previously used to materialize a point in time with different precisions (day, minute, system time), a time zone, a local and UTC value, and so on. Object properties were used to connect something to an instance of `TimeInstant`, specifying different relationships such as start and end, planned vs actual.
+    - Defined a top-level datatype property `atDateTime`, neutral as to start/end, planned/actual, and precision (day, minute, microsecond). Replaced existing object properties to a hierarchy of subproperties of `atDateTime`, retaining distinctions between start and end, planned vs actual, and precisions.
+    - Renamed `ContemporaneousEvent` to `ContemporaryEvent`.
+- Removed property  `gist:hasOrderedMember`. `gist:hasMember` should be used instead. Issue [#540](https://github.com/semanticarts/gist/issues/540).
+- Removed domain and range constraints from `gist:requires`. Issue [#183](https://github.com/semanticarts/gist/issues/183).
+- Removed domain and range constraints from `gist:hasNumerator`, `gist:hasDenominator`, `gist:hasMultiplier`, and `gist:hasMultiplicand`. Issue [#160](https://github.com/semanticarts/gist/issues/160).
+
 ### Minor Updates
 
-- Added unit symbols for unit instances per issue [#579](https://github.com/semanticarts/gist/issues/579).
+- Added unit symbols for unit instances instances per issue [#579](https://github.com/semanticarts/gist/issues/579).
 
 ### Patch Updates
 
 - Added labels to gist instances, per issue [#370](https://github.com/semanticarts/gist/issues/370).
-- Improved definitions for 'navigational' predicates, per issue [#523](https://github.com/semanticarts/gist/issues/523).
-- Modified `skos:definition` of `gist:Message` to match formal definitions, per issue [#194](https://github.com/semanticarts/gist/issues/194).
 - Added definitions for unit of measure instances per issue [#526](https://github.com/semanticarts/gist/issues/526).
-- Updated annotations for coherent unit classes, per issue [#146](https://github.com/semanticarts/gist/issues/146).
 - Deprecated property `gist:hasOrderedMember`. `gist:hasMember` should be used instead. Issue [#540](https://github.com/semanticarts/gist/issues/540).
+- Improved definitions of 'navigational' predicates, per issue [#523](https://github.com/semanticarts/gist/issues/523).
+- Modified `skos:definition` of `gist:Message` to match formal definitions, per issue [#194](https://github.com/semanticarts/gist/issues/194).
 - Removed min cardinality of zero restriction on `ProductUnit`, per issue [#582](https://github.com/semanticarts/gist/issues/582).
+- Improved definition of `gist:Task`, per issue [#625](https://github.com/semanticarts/gist/issues/625).
 
-Import URL: <https://ontologies.semanticarts.com/o/gistCoreX.x.x>.
+Import URL: <https://ontologies.semanticarts.com/o/gistCore11.0.0>.
 
 Release 10.0.0
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