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{{Reengineering_OP_Proposal_toolbar}} | {{Reengineering_OP_Proposal_toolbar}} | ||
{{Reengineering OP Proposal General Information Template | {{Reengineering OP Proposal General Information Template | ||
− | |Name=Faceted Classification Scheme (FCS) | + | |Name=[[Community:Faceted Classification Scheme|Faceted Classification Scheme]] (FCS) |
|Problem=Ontological representation of a specific domain concept conceptualized using a Faceted Classification Scheme (FCS). | |Problem=Ontological representation of a specific domain concept conceptualized using a Faceted Classification Scheme (FCS). | ||
}} | }} | ||
{{Reengineering OP Proposal NOR Template | {{Reengineering OP Proposal NOR Template | ||
− | |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" [ | + | |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" [[Community:References/How_to_Make_a_Faceted_Classification_and_Put_It_On_the_Web_3|(Denton, 2003)]]. |
The following notation is introduced to refer to the elements of a generic FCS in the figure below: | The following notation is introduced to refer to the elements of a generic FCS in the figure below: | ||
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}} | }} | ||
{{Reengineering OP Proposal Ontology Template | {{Reengineering OP Proposal Ontology Template | ||
− | |Description=Generic structure of | + | |Description=Generic structure of the [[Submissions:Normalization|Normalization]] ODP used to represent a Faceted Classification Scheme (FCS). |
− | The symbol (≡) denotes an OWL defined class. | + | [[Image:NormalizationGenericStructure1.png|center|frame|The symbol (≡) denotes an OWL defined class.]] |
+ | |||
+ | The figure below represents a further generalization of the [[Submissions:Normalization|Normalization]] ODP and introduces the following notation: | ||
+ | * '':TDC'' denotes a primitive class representing the domain concept being normalized. | ||
+ | * '':Module_i'' denotes a primitive class that represents one of the modules. | ||
+ | * '':M_iClass_j'' denotes a primitive class that represents a subset of the module class '':Module_i''. | ||
+ | * '':hasModule_i'' denotes an object property that links every module '':Module_i'' to the different subclasses of the target domain concept '':M_iClass_jTDC'' and '':SpecificTDC_x''. | ||
+ | * '':M_iClass_jTDC'' denotes a defined class that represents a subset of the target domain concept class '':TDC''. Every class '':M_iClass_jTDC'' is defined based on its relationship to the single corresponding class '':M_iClass_j'' that it is derived from. | ||
+ | * '':SpecificTDC_x'' denotes a primitive class that represents a subset of the target domain concept class '':TDC'' and an entity from the domain to be classified. Every class '':SpecificTDC_x'' is described based on its relationship to various classes '':M_iClass_j'' from potentially different modules. As a consequence of this relationship, the classes '':SpecificTDC_x'' could introduce the polyhierarchy scenarios in the ontology model that the [[Submissions:Normalization|Normalization]] ODP aims to manage and untangle. | ||
+ | |||
+ | 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. | |
|Graphical Representation=NormalizationGenericStructure2.png | |Graphical Representation=NormalizationGenericStructure2.png | ||
}} | }} | ||
{{Reengineering OP Proposal Process Template | {{Reengineering OP Proposal Process Template | ||
− | |Description=Mapping between the elements in the generic structure of a Faceted Classification Scheme and the Normalization ODP. | + | |Description=Mapping between the elements in the generic structure of a Faceted Classification Scheme and the [[Submissions:Normalization|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 [[Submissions:Normalization|Normalization]] ODP: | |
− | + | * The first column (leftmost), contains the elements of a generic FCS as introduced in section '''Non-Ontological Resource''' above. | |
− | + | * The second column contains the elements of the [[Submissions:Normalization|Normalization]] ODP generic structure | |
− | * | + | as introduced in section '''Ontology''' above. |
− | * | + | * The third column represents the selected OWL notation for the elements of a generic FCS in the context of the [[Submissions:Normalization|Normalization]] ODP generic structure. |
− | * | + | * The forth column (rightmost), indicates the OWL implementation chosen for every element. The selection complies with the requirements of the normalization mechanism. |
− | * | + | |
− | [[Image:MappingFCSNormalizationODP.png]] | + | [[Image:MappingFCSNormalizationODP.png|center]] |
+ | |||
+ | Based on the principle of representating each facet of a FCS as a module of the [[Submissions:Normalization|Normalization]] ODP, the underlying ideas behind the mappings in the figure(table) above can be outlined as follows: | ||
+ | * The target domain concept ''TDC'' represents the domain of discourse of both a FCS and the [[Submissions:Normalization|Normalization]] ODP. The primitive class '':TDC'' fulfills that role in the normalized ontology. | ||
+ | * A facet ''Facet_i'' from a generic FCS corresponds to a module '':Module_i'' in the [[Submissions:Normalization|Normalization]] ODP, therefore it becomes a primitive class '':Facet_i'' in the normalized ontology model. | ||
+ | * A facet ''Facet_i'' from a FCS also becomes an object property '':hasFacet_i'' in the normalized ontology, given that for every module '':Module_i'' in the [[Submissions:Normalization|Normalization]] ODP, there is an object property '':has_Module_i''. | ||
+ | * From the relationship between facet and module, it follows that a facet term ''F_iTerm_j'' from a FCS maps to a module subclass '':M_iClass_j'' from the [[Submissions:Normalization|Normalization]] ODP. Both elements represents the same notion in their respective conceptual models. A subvidision, a refinement of the facet or module that they complement respectively. Therefore, a facet term ''F_iTerm_j'' from a FCS becomes a primitive class '':F_iTerm_j'' in the normalized ontology. | ||
+ | * A facet term ''F_iTerm_j'' from a FCS also produces a defined class '':F_iTerm_jTDC'' in the normalized ontology, given that for every primitive class '':M_iClass_j'' in the [[Submissions:Normalization|Normalization]] ODP, there is a corresponding defined class '':M_iClass_jTDC''. | ||
+ | * Every item ''Item_x'' to be classified in the FCS aligns to a class '':Specific_x'' that is automatically classified by a reasoner in the [[Submissions:Normalization|Normalization]] ODP. Therefore, every element ''Item_x'' is represented as a primitive class '':SpecificTDC_x'' in the normalized ontology. | ||
|Graphical Representation=FacetedClassificationSchemeGenericStructure.png | |Graphical Representation=FacetedClassificationSchemeGenericStructure.png | ||
}} | }} | ||
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}} | }} | ||
{{Reengineering OP Proposal NOR Example Template | {{Reengineering OP Proposal NOR Example Template | ||
− | |Description=The figure below recaps the final FCS developed for the "Dishwashing Detergent" domain example in [ | + | |Description=The figure below recaps the final FCS developed for the "Dishwashing Detergent" domain example in [[Community:References/How_to_Make_a_Faceted_Classification_and_Put_It_On_the_Web_3|(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: |
* The ''TDC'' element is populated with the domain "Dishwashing Detergent". | * The ''TDC'' element is populated with the domain "Dishwashing Detergent". | ||
* ''Facet_i'' elements are populated with the facets: "Agent", "Form", "Brand Name", "Scent", "Effect On Agent", and "Special Property". | * ''Facet_i'' elements are populated with the facets: "Agent", "Form", "Brand Name", "Scent", "Effect On Agent", and "Special Property". | ||
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** "President's Choice Antibacterial Hand Soap and Dishwashing Liquid". | ** "President's Choice Antibacterial Hand Soap and Dishwashing Liquid". | ||
** "Palmolive Aroma Therapy, Lavender and Ylang Ylang". | ** "Palmolive Aroma Therapy, Lavender and Ylang Ylang". | ||
+ | |||
+ | To illustrate the representation of a specific dishwashing detergent, let us reuse the two classification examples presented in [[Community:References/How_to_Make_a_Faceted_Classification_and_Put_It_On_the_Web_3|(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: | ||
+ | * Agent: person | ||
+ | * Form: liquid | ||
+ | * Brand Name: President's Choice | ||
+ | * Scent: (none) | ||
+ | * Effect on Agent: (none) | ||
+ | * Special Property: antibacterial | ||
+ | |||
+ | The item "Palmolive Aroma Therapy, Lavender and Ylang Ylang," is classified as: | ||
+ | * Agent: person | ||
+ | * Form: liquid | ||
+ | * Brand Name: Palmolive | ||
+ | * Scent: lavender, ylang ylang | ||
+ | * Effect on Agent: aroma therapy | ||
+ | * Special Property: (none) | ||
|Graphical Representation=Denton_-_2003_-_FCS_Dishwashing_Detergent.jpg | |Graphical Representation=Denton_-_2003_-_FCS_Dishwashing_Detergent.jpg | ||
|Web Reference=http://www.miskatonic.org/library/facet-web-howto.html | |Web Reference=http://www.miskatonic.org/library/facet-web-howto.html | ||
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|Description=OWL representation of the "Dishwashing Detergent" domain concept Faceted Classification Scheme applying the Normalization ODP. | |Description=OWL representation of the "Dishwashing Detergent" domain concept Faceted Classification Scheme applying the Normalization ODP. | ||
− | + | [[Image:FacetedClassificationSchemeOntoExObjProp.png|center|frame|List of object properties.]] | |
− | + | The symbol (≡) denotes an OWL defined class. | |
|Graphical Representation=FacetedClassificationStructureOntologyExample.png | |Graphical Representation=FacetedClassificationStructureOntologyExample.png | ||
|Web Reference=http://dl.dropbox.com/u/1666716/Attachments/detergent_fcs_normalisation_prot3x_owl.owl | |Web Reference=http://dl.dropbox.com/u/1666716/Attachments/detergent_fcs_normalisation_prot3x_owl.owl | ||
}} | }} | ||
{{Reengineering OP Proposal Process Example Template | {{Reengineering OP Proposal Process Example Template | ||
− | |Description= | + | |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 | ||
+ | ] . | ||
|Graphical Representation=MappingFCSNormalizationODP.png | |Graphical Representation=MappingFCSNormalizationODP.png | ||
}} | }} | ||
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|Event=WOP:2010 | |Event=WOP:2010 | ||
}} | }} | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | [[Category:Review assigned]] |
Name | Faceted Classification Scheme]] (FCS) |
---|---|
Problem | Ontological representation of a specific domain concept conceptualized using a Faceted Classification Scheme (FCS). |
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:
|
---|---|
Graphical Representation |
Diagram |
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. |
---|---|
Graphical Representation |
Diagram |
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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Graphical Representation |
Diagram |
Description | To create an ontology model to represent an existing Faceted Classification Scheme for a specific domain concept. |
---|
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:
|
---|---|
Graphical Representation |
Diagram |
Web Reference | http://www.miskatonic.org/library/facet-web-howto.html |
Description | OWL representation of the "Dishwashing Detergent" domain concept Faceted Classification Scheme applying the Normalization ODP.
The symbol (≡) denotes an OWL defined class. |
---|---|
Graphical Representation |
Diagram |
Web Reference | http://dl.dropbox.com/u/1666716/Attachments/detergent_fcs_normalisation_prot3x_owl.owl |
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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Graphical Representation |
Diagram |
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 |
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