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| Concept | Annotation Property | Definition | Source | Notes |
|---|---|---|---|---|
| definition | skos:definition | formal statement of the meaning of a resource | https://www.w3.org/TR/skos-reference/#notes | Every element in an IDMP ontology must have a skos:definition - exactly one if the default of American English is intended which may optionally have a language tag; if more than one instance of skos:definition occurs, each must have a unique language tag, including the English definition. |
| logical definition | cmns-av:logicalDefinition | definition in the form of a formal expression, such as the mathematical or logic representation, for the resource | Object Management Group, Analysis & Design Task Force recommendation Also used in the Industrial Ontology Foundry (IOF) | The use of this annotation property is optional. There may be cases where representing the defining characteristics for a class, e.g., necessary and/or sufficient conditions for membership is made clearer through the description logics or first order representation, when this annotation may be used in addition to the skos:definition (but not instead of it). |
Example: There is no definition of molecular graph in the ISO standards. We need to be able to incorporate that to link to Chemantics data, for example. A rough definition for molecular graph is: "The Molecular Graph is a compound concept, which represents a single chemical structure, which is normalized to conform, as much as possible, with the IUPAC specification for drawing chemical structures." The resulting skos:definition, in ISO 704 format, leveraging the definition for molecular structure is: "single chemical structure that is an unambiguous representation of the arrangement of atoms, normalized to conform with the International Union of Pure and Applied Chemistry (IUPAC) specification for drawing chemical structures to the degree possible".
Example: Properties relating a substance to other substances, and to its structure, are not defined in the ISO standards. The skos:definition for isRelatedSubstanceTo is simply "relates a substance to another substance", and for hasStructure is "indicates any arrangement and/or organization of interrelated elements in a substance" at the highest level, so that it can be used generally to describe the structure of single or more complex substances.
Citations and References
Several annotation properties are useful for referring to the source for terminology, definitions, additional details or other information about a resource. For the purposes of IDMP, the following annotations may be used, as appropriate. We may investigate using a more complete ontology for bibliographic references if that becomes necessary over the course of the project.
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