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070517 Jena

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The document introduces Jena, an open source Java framework for building semantic web and linked data applications, describing how it can be used to process RDF and OWL models, perform inference using reasoners, and query data using SPARQL. It also provides instructions on installing and getting started with Jena, and includes examples of creating and querying RDF models, performing inference, and connecting to a MySQL database for persistence.

TechnologyEducation
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Jena: A Semantic Web Framework for Java Reporter C.F.Liao ( 廖峻鋒 ) May 17,2007
About Me ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RDF and OWL Processing API Model RDF Files Console Model I/O Model I/O Model CRUD OWL OWL OWL
Jena Inference Mechanism OWL OWL OWL ReasonerVocabulary Original Model Reasoner Rules Inferred Model
SPARQL (W3C Standard) Model SELECT ?x WHERE { ?x locatedIn classroom} … ?x = {Jane, Mary, and Peter} SPARQL Query Engine
Review: The RDF Network Light Switch1 state on Literal Resource Bedroom locatedIn size 9 contains TV1 Property
Key Abstractions Light Switch1 status on Bedroom locatedIn Browse the Jena Javadoc RDFNode
Recommended Development Environment ,[object Object],[object Object],[object Object]
Installing and Running Jena ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],demo
Downloading Jena ,[object Object]
Typical Jena Usage Scenario RDF Consumer (Jena) query RDF Files RDF Producer (Jena) Model (Memory) load add
Advanced Jena Usage Scenario Persistent RDF Model (Relational Database) RDF Publishing Server (Joseki) SPARQL over HTTP RDF Producer (Jena) Remote RDF Consumer (Jena)
Lab Creating a Simple RDF Model
Objectives ,[object Object],[object Object],[object Object],RDF Producer add print Model (Memory)
Creating RDF ,[object Object],[object Object],[object Object]
Creating a RDF statement ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],(light,status,off) ex1 demo light1 status off Model
Lab Model I/O
Model I/O ,[object Object],[object Object],System.out FileWriter Model
Loading RDF from an External File ,[object Object],[object Object],[object Object],[object Object],[object Object],src advai rdf smarthome.nt ReadRdfFromFileTest.java MyJenaProject ex2 demo bin ReadRdfFromFileTest.class
Dumping the Model ,[object Object],[object Object],[object Object],[object Object],System.out FileWriter ex3 demo Model
Lab Model CRUD
Model CRUD ,[object Object],[object Object],[object Object],[object Object],RDF Consumer (Jena) Model query
Navigating a Model ,[object Object],[object Object],[object Object],[object Object],RDF Consumer Model Reification ex4 demo query Subject Property Object
Querying Model ,[object Object],[object Object],[object Object],[object Object],[object Object],RDF Consumer Model Reification selector ex5 demo
Updating Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],RDF Consumer ex6 demo New object
Removing a Statement from Model ,[object Object],[object Object],[object Object],[object Object],[object Object],ex7 demo
Lab Basic Inference
Jena Inference Mechanism ReasonerRegistry RDFSReasoner Application Existing Model + Reasoner New Model (InfModel) ModelFactory Data (Model) GenericReasoner OwlReasoner ModelFactory InfModel
A Simple RDFS Reasoner Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],(Jane, teachesAt, NTU) RDFS Example demo (Jane, worksAt, NTU) teachesAt worksAt
Lab Ontological Inference
Modeling a Domain with Schema and Data Schema Level Data Level
Separating Schema and Data ReasonerRegistry RDFSReasoner GenericReasoner Application Data (Model) Schema (OntModel) OwlReasoner ModelFactory InfModel
Example: The Smart Home Ontology locatedIn contains inverse transitive Building Room Person Light type type type Home Bedroom Jane type light1 contains locatedIn
Creating OntModel with Ontology API ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ex8 demo Inverse relationship Create 4 Class Definitions properties Model Configuration
A Ont Reasoner Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ex10 demo
Lab Cascading Inference
Combining Generic and OWL Reasoners GenericReasoner Rules Data (Model) Schema (OntModel) OwlReasoner ontInfModel ModelFactory infModel ModelFactory
An “Openlight” Rule ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],“ if a person is in the bedroom then open all light”
Cascading Reasoners ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ex11 demo
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Querying Model with SPARQL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Sparql Demo
Persisting RDF Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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070517 Jena

  • 1. Jena: A Semantic Web Framework for Java Reporter C.F.Liao ( 廖峻鋒 ) May 17,2007
  • 2.
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  • 5. RDF and OWL Processing API Model RDF Files Console Model I/O Model I/O Model CRUD OWL OWL OWL
  • 6. Jena Inference Mechanism OWL OWL OWL ReasonerVocabulary Original Model Reasoner Rules Inferred Model
  • 7. SPARQL (W3C Standard) Model SELECT ?x WHERE { ?x locatedIn classroom} … ?x = {Jane, Mary, and Peter} SPARQL Query Engine
  • 8. Review: The RDF Network Light Switch1 state on Literal Resource Bedroom locatedIn size 9 contains TV1 Property
  • 9. Key Abstractions Light Switch1 status on Bedroom locatedIn Browse the Jena Javadoc RDFNode
  • 10.
  • 11.
  • 12.
  • 13. Typical Jena Usage Scenario RDF Consumer (Jena) query RDF Files RDF Producer (Jena) Model (Memory) load add
  • 14. Advanced Jena Usage Scenario Persistent RDF Model (Relational Database) RDF Publishing Server (Joseki) SPARQL over HTTP RDF Producer (Jena) Remote RDF Consumer (Jena)
  • 15. Lab Creating a Simple RDF Model
  • 16.
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  • 30. Jena Inference Mechanism ReasonerRegistry RDFSReasoner Application Existing Model + Reasoner New Model (InfModel) ModelFactory Data (Model) GenericReasoner OwlReasoner ModelFactory InfModel
  • 31.
  • 33. Modeling a Domain with Schema and Data Schema Level Data Level
  • 34. Separating Schema and Data ReasonerRegistry RDFSReasoner GenericReasoner Application Data (Model) Schema (OntModel) OwlReasoner ModelFactory InfModel
  • 35. Example: The Smart Home Ontology locatedIn contains inverse transitive Building Room Person Light type type type Home Bedroom Jane type light1 contains locatedIn
  • 36.
  • 37.
  • 39. Combining Generic and OWL Reasoners GenericReasoner Rules Data (Model) Schema (OntModel) OwlReasoner ontInfModel ModelFactory infModel ModelFactory
  • 40.
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  翻译：