This pattern has been certified.
Related submission, with evaluation history, can be found here
|
Last modified date is: 2010-09-06
|
General information
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:
- Target Domain Concept (TDC) denotes the domain of discourse. The domain-specific concept targeted by the FCS.
- Facet_i denotes one of the facets of the FCS.
- F_iTerm_j denotes one of the terms of Facet_i.
- Item_x denotes one the items from the domain of discourse (TDC) to be classified.
|
| Graphical Representation
|
Diagram
|
Ontology
| Description
|
Generic structure of the Normalization ODP used to represent a Faceted Classification Scheme.
The symbol (≡) denotes an OWL defined class.
The figure below represents a further generalization of the 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 Normalization ODP aims to manage and untangle.
|
| 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:
- 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 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 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.
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:
- The target domain concept TDC represents the domain of discourse of both a FCS and the 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 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 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 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 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 Normalization ODP. Therefore, every element Item_x is represented as a primitive class :SpecificTDC_x in the normalized ontology.
|
| Graphical Representation
|
Diagram
|
Scenario example
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:
- 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".
- F_iTerm_j elements are populated with the terms or foci listed below (grouped by facet):
- Agent: dishwasher, person.
- Form: gel, gelpac, liquid, powder, tablet.
- Brand Name: Cascade, Electrasol, Ivory, No Name, Palmolive, President's Choice, Sunlight.
- Scent: green apple, green tea, lavender, lemon, mandarin, ocean breeze, orange blossom, orchard fresh, passion flower, ruby red grapefruit, ylang ylang.
- Effect on Agent: aroma therapy (subdivisions: invigorating, relaxing).
- Special Property: antibacterial.
- Item_x elements are populated in this case with two example items to classify:
- "President's Choice Antibacterial Hand Soap and Dishwashing Liquid".
- "Palmolive Aroma Therapy, Lavender and Ylang Ylang".
|
| Graphical Representation
|
Diagram
|
| Web Reference
|
http://www.miskatonic.org/library/facet-web-howto.html
|
Ontology example
Process example
About
Additional information
Scenarios
Scenarios about Faceted Classification Scheme
No scenario is added to this Content OP.
Reviews
Reviews about Faceted Classification Scheme
There is no review about this proposal.
Some subquery has no valid condition.
This revision (revision ID 10023) takes in account the reviews: none
Other info at evaluation tab
Modeling issues
Modeling issues about Faceted Classification Scheme
There is no Modeling issue related to this proposal.
Some subquery has no valid condition.
References
Add a reference
'Ontology Design Patterns'
