Submissions:Faceted Classification Scheme
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General information
Name | Faceted Classification Scheme (FCS) |
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Problem | Ontological representation of a specific domain concept conceptualized using a Faceted Classification Scheme (FCS). |
Non-Ontological Resource
Description | A FCS is defined as: "a set of mutually exclusive and jointly exhaustive categories, each made by isolating one perspective on the items (a facet), that combine to completely describe all the objects in question, and which users can use, by searching and browsing, to find what they need" (Denton, 2003).
The following notation is introduced to refer to the elements of a generic FCS in the figure below:
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Diagram |
Ontology
Description | Generic structure of the Normalization ODP used to represent a Faceted Classification Scheme (FCS).
The figure below represents a further generalization of the Normalization ODP and introduces the following notation:
The implementation of a generic defined class :M_iClass_jTDC is given as follows: :M_iClass_jTDC rdf:type owl:Class ; rdfs:subClassOf :TDC ; owl:equivalentClass [ rdf:type owl:Restriction ; owl:onProperty :hasModule_i ; owl:someValuesFrom :M_iClass_j ] . The implementation of a generic class :SpecificTDC_x is given as follows: :SpecificTDC_x rdf:type owl:Class ; rdfs:subClassOf :TDC , [ rdf:type owl:Restriction ; owl:onProperty :hasModule_i ; owl:someValuesFrom :M_iClass_j ] , [ ... rest of existential restrictions on property :hasModule_i for every class :M_iClass_j that participates in the description of :SpecificTDC_x ] . This implementation of the classes :M_iClass_jTDC and :SpecificTDC_x respectively, enable a reasoner to infer and maintain the subsumption relations between a given class :SpecificTDC_x and the various classes :M_iClass_jTDC that it is related to. |
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Graphical Representation |
Diagram |
Process
Description | Mapping between the elements in the generic structure of a Faceted Classification Scheme and the Normalization ODP.
The table below summarizes the alignment of the elements in the generic structure of both conceptual models. This alignment enables the conversion from a FCS to an OWL DL ontology by applying the Normalization ODP:
as introduced in section Ontology above.
Based on the principle of representating each facet of a FCS as a module of the Normalization ODP, the underlying ideas behind the mappings in the figure(table) above can be outlined as follows:
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Scenario example
Description | To create an ontology model to represent an existing Faceted Classification Scheme for a specific domain concept. |
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Example of a Non-Ontological Resource
Description | The figure below recaps the final FCS developed for the "Dishwashing Detergent" domain example in (Denton, 2003)(§ 2.4). The elements of the schema fit into the generic structure of a FCS presented in section Non-Ontological Resource earlier, where:
To illustrate the representation of a specific dishwashing detergent, let us reuse the two classification examples presented in (Denton, 2003)(§ 2.4). Applying the "Dishwashing Detergent" FCS developed in the cited reference, the item "President's Choice Antibacterial Hand Soap and Dishwashing Liquid" is classified as follows:
The item "Palmolive Aroma Therapy, Lavender and Ylang Ylang," is classified as:
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Diagram |
Web Reference | http://www.miskatonic.org/library/facet-web-howto.html |
Ontology example
Description | OWL representation of the "Dishwashing Detergent" domain concept Faceted Classification Scheme applying the Normalization ODP.
The symbol (≡) denotes an OWL defined class. |
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Diagram |
Web Reference | http://dl.dropbox.com/u/1666716/Attachments/detergent_fcs_normalisation_prot3x_owl.owl |
Process example
Description | According to the guidelines derived from the table in section Process above and the implementation of a class :SpecificTDC_x given in section Ontology above, the description of the example detergent "President's Choice Antibacterial Hand Soap & Dishwashing Liquid" in the normalized ontology can be stated as follows:
:PresidentsPersonLiquidAntibacterial rdf:type owl:Class ; rdfs:subClassOf :DishDetergent , [ rdf:type owl:Restriction ; owl:onProperty :hasAgent ; owl:someValuesFrom :Person ] , [ rdf:type owl:Restriction ; owl:onProperty :hasForm ; owl:someValuesFrom :Liquid ] , [ rdf:type owl:Restriction ; owl:onProperty :hasBrandName ; owl:someValuesFrom :PresidentsChoice ] , [ rdf:type owl:Restriction ; owl:onProperty :hasSpecialProperty ; owl:someValuesFrom :Antibacterial ] . The description of the example detergent "Palmolive Aroma Therapy, Lavender and Ylang Ylang," would be: :PalmoliveAromaTherapyLavenderYlangYlang rdf:type owl:Class ; rdfs:subClassOf :DishDetergent , [ rdf:type owl:Restriction ; owl:onProperty :hasAgent ; owl:someValuesFrom :Person ] , [ rdf:type owl:Restriction ; owl:onProperty :hasForm ; owl:someValuesFrom :Liquid ] , [ rdf:type owl:Restriction ; owl:onProperty :hasBrandName ; owl:someValuesFrom :Palmolive ] , [ rdf:type owl:Restriction ; owl:onProperty :hasScent ; owl:someValuesFrom :Lavender ] , [ rdf:type owl:Restriction ; owl:onProperty :hasScent ; owl:someValuesFrom :YlangYlang ] , [ rdf:type owl:Restriction ; owl:onProperty :hasEffectOnAgent ; owl:someValuesFrom :AromaTherapy ] . |
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About
SubmittedBy | BenedictoRodriguezCastro |
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Author | BenedictoRodriguezCastro, HughGlaser, LesCarr |
Also known as | |
Known uses | |
Related to | Submissions:Normalization, Submissions:Partition, Submissions:ClassAsPropertyValue |
Other References |
Additional information
Scenarios
No scenario is added to this Content OP.
Reviews
Review article | Posted on | About revision (current is 10104) |
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RimDJEDIDI about Faceted Classification Scheme | 245545515 September 2010 | 1006710,067 |
VojtechSvatek about Faceted Classification Scheme | 245545717 September 2010 | 1010410,104 |
AndreaNuzzolese about Faceted Classification Scheme | 245546020 September 2010 | 1010410,104 |
BorisVillazón-Terrazas about Faceted Classification Scheme | 245545717 September 2010 | 1010410,104 |
This revision (revision ID 10104) takes in account the reviews: none
Other info at evaluation tab
Modeling issues
Modeling issue | Competency question | Domains |
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Multiple Alternative Classification Criteria | Allow me to retrieve all "elements" (classes/individuals) of a "domain concept" viewed by a combination of "values" (or "terms") from various "classification criteria" (or "facets"). | |
View Inheritance | For example in the case of the representation of the "wine" domain concept:
In the case of the representation of the "pizza" domain concept:
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References
- Normalization Ontology Design Pattern Documentation | reference page
- Spiteri, Louise. A simplified model for facet analysis: Ranganathan 101. Canadian Journal of Information and Library Science, 23(1/2):1-30, 1998. Documentation | reference page
- Egana-Aranguren, Mikel. Role and Application of Ontology Design Patterns in Bio-ontologies. PhD thesis, School of Computer Science, University of Manchester, 2009. Documentation | reference page
- Denton, William. How to Make a Faceted Classification and Put It On the Web. Nov 2003. Documentation | reference page
- Rodriguez-Castro, B., Glaser, H. and Carr, L. (2010) How to Reuse a Faceted Classification and Put it on the Semantic Web. In: The 9th International Semantic Web Conference (ISWC), November 2010, Shanghai, China. Documentation | reference page
- Alan L. Rector. Modularisation of domain ontologies implemented in description logics and related formalisms including owl. In K-CAP '03: Proceedings of the 2nd international conference on Knowledge capture, pages 121{128, New York, NY, USA, 2003. ACM. ISBN 1-58113-583-1. Documentation | reference page
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