UMBEL is a lightweight ontology and subject concept framework comprised of around 20,000 concepts and their relationships that aims to provide context for web content and datasets. It serves as a reference structure for placing information into context with other data by defining common subject concepts and mapping entities and datasets to these concepts. UMBEL is freely available under an open source license and relies on existing vocabularies and ontologies like SKOS, RDFS, and OWL to provide interoperability.

1. July 2008 Upper Mapping and Binding Exchange Layer UMBEL: A Subject Concepts Reference Layer for the Web

4. Derived from OpenCyc . . . 90% reduction

12. A Deep Dive into the Backbone . . . . . . all 20,000 nodes

13. A Deep Dive into the Backbone . . . . . . top 750 nodes

14. A Deep Dive into the Backbone . . . . . . top 350 nodes

15. A Deep Dive into the Backbone . . . . . . zeroing in on ‘automobiles’

16. A Deep Dive into the Backbone . . . . . . zeroing in on ‘Saabs’

17. The UMBEL Ontology

21. Sample Specification

24. The First Dozen Web Services

26. Demos, Docs & APIs

27. Find Subject Concept

28. Subject Concept Detailed Report

29. Subject Concept Explorer

30. YAGO Ontology

32. Conclusion and Further Information

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