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O&M Specimen model – alignments with PROV, BCO
1. O&M Specimen model – alignments with
PROV, BCO
Simon Cox | Research Scientist | Environmental Information Infrastructures
3 September 2015
LAND AND WATER
3. sam-lite ontology
IGSN Metadata workshop - 2015-09-03
Cox, SJD, Ontology for observations and sampling features, with alignments to existing models,
Semantic Web Journal (in review)
http://www.semantic-web-journal.net/content/ontology-observations-and-sampling-features-alignments-existing-models
10. LAND AND WATER
Thank youCSIRO Land and Water
Simon Cox
Research Scientist
t +61 3 9252 6342
e simon.cox@csiro.au
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Hinweis der Redaktion
In order for the vision of the semantic web to be fulfilled, ontologies developed for related applications and deployed by different organizations must be aligned. Some ontologies are tied to a particular foundation ontology (such as BFO, GFO, UFO or DOLCE) by design, with their key classes in a subsumption hierarchy derived from the upper ontology. This enables rapid alignment with other ontologies developed in the same framework, but can present barriers otherwise.
The Semantic Sensor Network ontology (SSN) was developed through a W3C incubator group with the goal of providing a general purpose ontology for sensor-based observations. It has seen widespread adoption in the semantic web community. On the other hand, in the geospatial community, OGC Observations and Measurements (O&M) provides the model used for standard observation services. While SSN adopts much of the terminology from O&M, full alignment has been a challenge. This is confounded by the fact that each is rooted in a different base “ontology” – SSN uses DOLCE as its foundation, while O&M is formalized as part of the ISO/TC 211 harmonised (UML) model. While some conflict derives from the tension between the frame-based UML paradigm used for O&M and the open-world, description-logics based paradigm used in SSN, this does not appear to be the whole story.
A possible resolution is provided by comparing recent studies that align SSN and O&M, respectively, with the PROV-O ontology. PROV-O provides just three base classes: Entity, Activity and Agent. om:Observation is sub-classed from prov:Activity, while ssn:Observation is sub-classed from prov:Entity. This implies that, despite the same name, om:Observation and ssn:Observation denote different aspects of the observation process: the observation event, and the record of the observation event, respectively.
Alignment with the simple PROV-O classes has clarified this issue in a way that had previously proved difficult to resolve. The simple 3-class base model from PROV appears to provide just enough logic to serve as a lightweight upper ontology.