This page is intended to support the process of improving and validating the use and representation of values, including reference data across FIBO. Values in this regard may be distinguished from “entities”; values are immutable and non-temporal, their identity is fully defined by their immutable content. Values includes xsd defined literals , FIBO “Business Facing Types” (BFT) and OWL classes representing values. A common abstraction and representation for value classes is defined in the ontology “Values.rdf”, however that ontology has issues that must be resolved. A A process is required to make FIBO consistently follow current polices.
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· Maintaining (and improving) consistency and validity across all of FIBO
· Changes potentially impacting OMG specifications (such as the ontologies reused from the Commons Ontology Library (COMMONS), Multiple Vocabulary Facility (MVF), and Languages, Countries and Codes (LCC) – see https://www.omg.org/spec/
· Changes impacting current use of FIBO
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· Consistency with referenced standards, including, for example, the ISO MIC codes, FpML reference interest rates, and the like
· Semantic precision
· Technology and data representation independence
· Business Facing Types is now thought to be undesirable and should be deprecated· Balancing consistency with ontologists preference
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· There is a lack constancy across FIBO in the use and representation of FIBO values.
· The current Values.RDF redundantly defines concepts covered in established ontologies and has other issues previously documented.
· It has been established that a repaired Values.RDF should be use as the foundation for FIBO classes representing values.
· It has further been established that xsd literals and datatype properties may be used when there is insufficient semantic leverage in using value defined classes (noting that this is subjective)· Existing use of BFT was mechanically changed to use Values.RDF across much of FIBO (101 Ontologies) resulting in undesirable patterns – arbitrary use of classes where literals are sufficient and failure of existing classes to subclass “Value”.
Statistics to help evaluate scope and impact
(Some are approximate – raw data is available)
· Types in Values.rdf are used 560 times across 101 ontologies
· XSD data types are used 146 times across 102 ontologies
· BFTs are used 64 times across 15 ontologies
· There are also thousands of uses of XSD types in individuals and metadata
Recommended changes
· Type substitutions as defines in the [Values Substitutions Page]
· Consistent use of Values as defined in the [Values Review Page]
Process summary
· Come to agreement on the changes to be made (this page). Note decisions are required for items marked “Choice”.
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· Export impacted ontologies· Review and validate Values.RDF
· Validate changes with Protégé
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· Check-in any modifications
· FND Team to review & modify each of the ontologies on the “Values Review Page”
· Check in and , repeat validations
· Complete with pull request
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