These are the principal changes between the last public release, version 1.20, and this version 1.50. In summary, these changes include:

• Removed all instance or individual listings from UMBEL; this change does NOT affect the punning used in UMBEL's design (see Metamodeling in Domain Ontologies)
• Re-aligned the SuperTypes to better support computability of the UMBEL graph and its resulting disjointedness
• These SuperTypes were eliminated with concepts re-assigned: Earthscape, Extraterrestrial, Notations and Numbers
• These new SuperTypes were introduced: AreaRegion, AtomsElements, BiologicalProcesses, Forms, LocationPlaces, and OrganicChemistry, with logically reasoned assignments of RefConcepts
• The Shapes SuperType is a new ST that is inherently non-disjoint because it is shared with about half of the RefConcepts
• The Situations is an important ST, overlooked in prior efforts, that helps better establish context for Activities and Events
• Made re-alignments in UMBEL's upper structure and introduced additional upper-level categories to better accommodate these refinements in SuperTypes
• A typology was created for each of the resulting 31 disjoint STs, which enabled missing concepts to be identified and added and to better organize the concepts within each given ST
• The broad adoption of the typology design for all of the (disjoint) SuperTypes also meant that prior module efforts, specifically Geo and Attributes, could now be made general to all of UMBEL. This re-integration also enabled us to retire these older modules without affecting functionality
• The tests and refinements necessary to derive this design caused us to create flexible build and testing scripts, documented via literate programming (using Clojure)
• Updated all mappings to DBpedia, Wikipedia, and schema.org
• Incorporated donated mappings to five additionial LOV vocabularies
• Tested the UMBEL structure for consistency and coherence
• Updated all prior UMBEL documentation
• Expanded and updated the UMBEL.org Web site, with access and demos of UMBEL.

• Expanded mappings to OpenCyc to better capture coverage of Wikipedia content; there are now 35,533 reference concepts (RCs) in UMBEL, 35,302 of which are mapped to OpenCyc (the unmapped RCs are mostly used for organizational purposes in the Attributes Ontology and OpenCyc mismatches with key external ontologies)
• Created a new Attributes Ontology (AO), with the purpose of enabling property (attribute) mappings to UMBEL (see further the UMBEL Annex L discussion for more details on this version update)
• Created a new Attributes module, with 1,002 RCs assigned
• Created a new Entities SuperType, with 20,393 RCs designated. The Entities ST is by definition non-disjoint with UMBEL's other SuperTypes
• Created a new Entities module, with 9,317 RCs assigned; the remainder of the Entites RCs are in core
• Expanded the direct UMBEL RC to Wikipedia page mappings, with 25,582 currently mapped, or nearly three-quarters (72%) of RCs now assigned
• Created a new Annex Z to hold updated statistics about UMBEL
• Deprecated the Workplaces SuperType, and merged with the Facilities ST
• Deprecated the MarketIndustries SuperType, and merged with the Attributes ST
• Reviewed and greatly improved ST assignments across the board; notably, the distinction between the Events and Activities SuperTypes was improved. See Annex Z for the updated ST assignment statistics
• Greatly expanded and improved the UMBEL generator to handle satisfiability tests and modules creation
  Expanded and updated the UMBEL.org Web site.

All external mappings updated; full scripting now applied to checking concept consistency, linkages to SuperTypes, completing of definitions, and enforcing of uniqueness to prefLabels (to better distinguish in autocompletion); other coherency checks; as a result, some earlier concepts dropped, resulting in a lower RC total count.