| Overview |
| Model Spec. |
| Description |
| XML |
| WSDL |
| RDFS |
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| Demo |
Component Service Model with Semantics:
RDF Schema style ver.1.0
Abstract
This document specifies a representation of Component Service Model with Semantics using RDF Schema. This representation uses RDF Schema and OWL to represent semantics and ontologies.
Table of Contents
1. Introduction
2. Namespace
3. RDF Schema representation of CoSMoS
Concept
Ontology
Noun
Link
Logics
4. Examples
1.Introduction
This document specifies a representation of Component Service Model with Semantics using RDF Schema (CoSMoS/RDFS). This representation is designed for modeling semantics of components, including concepts, predicates, ontologies, and logics. Since CoSMoS/RDFS itself cannot represent functional information of components, it must be used with another XML representation of CoSMoS, such as CoSMoS/XML or CoSMoS/WSDL.
2.Namespace
This document uses the following namespaces.
| Name | Namespace |
| rdf | http://www.w3.org/1999/02/22-rdf-syntax-ns# |
| rdfs | http://www.w3.org/2000/01/rdf-schema# |
| owl | http://www.w3.org/2002/07/owl# |
| log | http://www.w3.org/2000/10/swap/grammar/log# |
3. RDF representation of CoSMoS
Concept
CoSMoS/RDFS defines a concept node as a subclass of cosmos:Concept class.
|
<rdfs:Class rdf:ID="String"> <rdfs:subClassOf rdf:resource="&cosmos;Concept"/> </rdf:Description> |
The rdf:ID attribute of the rdf:Description defines the name of the concept node.
Predicate
CoSMoS/RDFS defines a predicate node as a subclass of cosmos:Predicate class.
|
<rdfs:Class rdf:ID="String"> <rdfs:subClassOf rdf:resource="&cosmos;Predicate"/> </rdf:Description> |
The rdf:ID attribute of the rdf:Description defines the name of the predicate node.
Noun
CoSMoS/RDFS defines a noun node as a subclass of cosmos:Noun class.
|
<rdfs:Class rdf:ID="String"> <rdfs:subClassOf rdf:resource="&cosmos;Noun"/> </rdf:Description> |
The rdf:ID attribute of the rdf:Description defines the name of the predicate node.
Ontology
CoSMoS/RDFS defines an ontology using standard ontology languages such as RDF Schema and OWL. Currently, CoSMoS/RDFS supports rdfs:subClassOf and owl:equivalentClass.
rdfs:subClassOf is used to define that a concept is a subtype of another concept. For example, the following CoSMoS/RDFS shows that RV is a subtype of Car.
|
<rdfs:Class rdf:ID="Car"> <rdfs:subClassOf rdf:resource="&cosmos;Noun"/> </rdf:Description> <rdfs:Class rdf:ID="RV"> |
owl:equivalentClass is used to specify that two concepts represent the same thing. For example, the following CoSMoS/RDFS shows that Car and Automobile are the same concepts.
|
<rdfs:Class rdf:ID="Car"> <rdfs:subClassOf rdf:resource="&cosmos;Noun"/> </rdf:Description> <rdfs:Class rdf:ID="Automobile"> |
Link
CoSMoS/RDFS defines a link between two concepts using rdf:Statement, which consists of rdf:subject, rdf:predicate and rdf:object. First, a link must be defined using rdf:Description. A link node must be an instance of rdfs:Property, and should be as a subclass of either cosmos:Link or cosmos:AnyLink.
|
<rdfs:Property rdf:ID="String"> <rdfs:subClassOf rdf:resource="&cosmos;Link"/> </rdf:Description> |
Then, rdf:Statement node is used to specify a link that connects two concept nodes.
|
<rdf:Statement> <rdf:subject rdf:resource="String"/> <rdf:predicate rdf:resource="String"/> <rdf:object rdf:resource="String"/> </rdf:Statement> |
Logic
Logics is defined using rdf:Statement and log:implies. For example, the following CoSMoS/RDFS shows an induction rule defining that "A Person watches a movie" implies "A TV plays a movie".
|
<rdf:Statement rdf:ID="aSatament> <rdf:subject rdf:resource="#Person"/> <rdf:predicate rdf:resource="#watch"/> <rdf:object rdf:resource="#Movie"/> </rdf:Statement> <rdf:Statement rdf:ID="anotherSatament> <rdf:Description rdf:about="#aStatement"> |
rdf:Bag and rdf:Alt are used as Boolean AND and OR operations, respectively.
4. Examples of CoSMoS/RDFS
Here is an example of CoSMoS/RDFS
| CoSMoS/RDFS | CoSMoS graph representation |
| sample.rdfs |
|
