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Realizing a Semantic Web Application Emanuele Della Valle Dario Cerizza Irene Celino http://www.cefriel.it    http://swa.cefriel.it     [email_address]   http://emanueledellavalle.org 7 th  Int. Semantic Web Conference  ISWC 2008 Karlsruhe, Germany, October 26, 2008 C enter of  E xcellence  F or  R esearch,  I nnovation,  E ducation and industrial  L ab partnership - Politecnico di Milano
Goal ,[object Object],[object Object],[object Object],[object Object],[object Object]
Ingredients ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Towards a Semantic Web ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],*  http://www.w3.org/People/Ivan/CorePresentations/IntroThroughExample/
Towards a Semantic Web ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Towards a Semantic Web ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A user need for meex ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A manual solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A manual solution ,[object Object]
A manual solution ,[object Object]
A manual solution ,[object Object]
A manual solution ,[object Object]
Music Event Explorer ,[object Object]
What is needed? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],*  http://www.w3.org/People/Ivan/CorePresentations/IntroThroughExample/
The rough structure of data integration ,[object Object],[object Object],[object Object],[object Object],[object Object]
The rough structure of data integration
So where is the Semantic Web? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
So where is the Semantic Web?
A Semantic Web application is still an application! ,[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4  Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1   Testing
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4  Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1   Testing
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4  Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1   Testing
Content requirements analysis ,[object Object],[object Object],[object Object],[object Object]
EVDB ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MusicBrainz ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MusicMoz ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
meex needs to merge this data ,[object Object],[object Object],[object Object],[object Object]
Data Licences ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Application requirements analysis (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Application requirements analysis (2) ,[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],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1  Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1  Testing
Motivations for RDF ,[object Object],[object Object],[object Object],[object Object],*  http://www.w3.org/2008/Talks/1027-ISWC/HCLS
What does RDF provide? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
How do we write RDF? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Turtle Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Convience Syntax ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Convience Syntax ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Artist data in RDF ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RDF Resources ,[object Object],[object Object],[object Object]
RDFS/OWL in a nutshell: class and instance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Artist Painter Sculptor Rodin
RDFS/OWL in a nutshell: properties ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],creates paints
RDFS/OWL in a nutshell: range & domain ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The resulting ontology
Some Inference Rules ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Inference at work ,[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]
Inference at work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Model the Application Ontology ,[object Object],[object Object],[object Object],[object Object],[object Object]
Modeling  Performer  in OWL ,[object Object],[object Object],[object Object],[object Object],[object Object],Meex.n3
Modeling  Style  in OWL ,[object Object],[object Object],[object Object],[object Object],Meex.n3
Modeling  Event  in OWL ,[object Object],[object Object],[object Object],[object Object],[object Object],Meex.n3 ,[object Object]
Modeling  When  in OWL ,[object Object],[object Object],[object Object],[object Object],[object Object],GoogleSchema.n3
Modeling  Where  in OWL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],GoogleSchema.n3
Model the content ontology ,[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1  Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1  Testing
Modeling MusicBrainz schema in OWL @prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> . @prefix owl:  <http://www.w3.org/2002/07/owl#> . @prefix mb:  <http://musicbrainz.org/> . mb:Artist  a  owl:Class ;   rdfs:label  &quot;MusicBrainz Artist and Band&quot; . mb:artist_relation  a  owl:ObjectProperty ;   rdfs:domain  mb:Artist ;   rdfs:range  mb:Artist . MusicBrainz.n3 artist artist_relation id gid artist ref
Sample data for MusicBrainz in OWL ,[object Object],[object Object],[object Object],SampleInstance-MusicBrainz.n3 ,[object Object]
MusicMoz schema category from * resource style 1 * name link name string type
Modeling MusicMoz schema in OWL @prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> . @prefix owl:  <http://www.w3.org/2002/07/owl#> . @prefix mm:  <http://musicmoz.org/> . @prefix mb:  <http://musicbrainz.org/> . mm:from  a  owl:DatatypeProperty ;   rdfs:domain  mb:Artist ;   rdfs:range <http://www.w3.org/2001/XMLSchema#string>. mm:Style  a owl:Class ;   rdfs:label  &quot;MusicMoz Music Style&quot; . mm:hasStyle  a  owl:ObjectProperty ;   rdfs:domain  mb:Artist ;   rdfs:range  mm:Style . MusicMoz.n3
Sample data for MusicMoz in OWL ,[object Object],[object Object],SampleInstance-MusicMoz.n3 ,[object Object]
Modeling EVDB schema in OWL @prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> . @prefix owl:  <http://www.w3.org/2002/07/owl#> . @prefix evdb:  <http://eventful.com/> . @prefix gd:  <http://schemas.google.com/g/2005> . evdb:Event  a  owl:Class ;   rdfs:label  &quot;Eventful Event&quot; . evdb:hasWhen  a  owl:ObjectProperty ;   rdfs:domain  evdb:Event ;   rdfs:range  gd:When . evdb:hasWhere  a  owl:ObjectProperty ;   rdfs:domain  evdb:Event ;   rdfs:range  gd:Where . EVDB.n3 ,[object Object]
Sample data for EVDB in OWL ,[object Object],[object Object],[object Object],[object Object],SampleInstance-EVDB.n3
“ Application Connected by Concepts ” artists Music styles events time places Meex ontology MusicBrainz EVDB  MusicMoz Meex
Why SPARQL? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],*  http://www.w3.org/2008/Talks/1027-ISWC/HCLS
SELECTing variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Triple patterns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Simple query pattern ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Result forms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Protocol Mechanics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SPARQL Resources ,[object Object],[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4 Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1  Testing
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
meex interfaces MusicBrainz database Adapter Database    RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB     RDF MusicMoz    RDF XML 2) RDF 1 )  Music style User
How we access the data ,[object Object],[object Object],[object Object],[object Object]
User Interface ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Designing how meex works inside Ajax Web Framework  GRDDL Processor For each Artist SPARQL Client MusicBrainz SPARQL Endpoint HTTP REST Client EVDB  HTTP REST service GRDDL Processor EVDB     RDF MusicMoz    RDF Linking Artists to Events RDF Merge Extraction and Transformation Ajax Web Framework  Music style Set of artist in RDF Artist SPARQL Query Events in XML Events in RDF Artists and events in RDF Artist data in RDF HTTP Query Dati RDF Artists and events in RDF
Execution Semantics (1) ,[object Object],[object Object],[object Object]
Execution Semantics (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Execution Semantics (3) ,[object Object],[object Object],[object Object],[object Object]
Two important internal components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4 Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1  Testing
Implement the initial Knowledge Base  (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Implement the initial Knowledge Base  (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Configuring the RDF storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Configuring the OWL reasoner ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4 Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1  Testing
Implement the integrated model  (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Implement the integrated model  (2) ,[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]
Implement the integrated model  (3) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Implement the integrated model  (4) ,[object Object],SampleInstance-MusicBrainz.n3 mb:artist/b10bbbfc-cf9e-42e0-be17-e2c3e1d2600d.html a meex:Performer ; rdfs:label  &quot;The Beatles&quot; ; meex:relatedPerformer   mb:artist/ebfc1398-8d96-47e3-82c3-f782abcdb13d.html ,   mb:artist/618b6900-0618-4f1e-b835-bccb17f84294.html . Data-in-MusicBrainz-inferred-using-the-bridge-ontology.n3
Implement the integrated model  (5) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4 Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1  Testing
Testing the integrated model  ,[object Object],[object Object],[object Object]
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4 Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1  Testing
Choose content annotation methods ,[object Object],[object Object],[object Object]
meex interfaces (1) MusicBrainz database Adapter Database    RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB     RDF MusicMoz    RDF XML 2) RDF 1 )  Music style User
Importing annotations from MusicBrainz ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Configuring D2RQ for MusicBrainz (1) ,[object Object],[object Object],[object Object],D2RQ-MusicBrainzDB.n3 artist artist_relation id gid artist ref
Configuring D2RQ for MusicBrainz (1) ,[object Object],[object Object],[object Object],[object Object],D2RQ-MusicBrainzDB.n3 NOTE  due to a limitation of D2RQ we need to create a view of the Artist table create view Artist2 select * from Artist artist artist_relation id gid artist ref
Configuring Joseky for MusicBrainz ,[object Object],[object Object],[object Object],joseki-config.ttl ,[object Object],[object Object]
Testing the SPARQL endpoint ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
meex interfaces (2) MusicBrainz database Adapter Database    RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB     RDF MusicMoz    RDF XML 2) RDF 1 )  Music style User
Importing annotations from  MusicMoz and EVDB ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Importing annotations from  MusicMoz (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Excerpts from the files musicmoz.bandsandartists.xml and musicmoz.lists.styles.xml
Importing annotations from  MusicMoz (2) ,[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],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Excerpts from the file musicmoz-to-rdf.xsl
Importing annotations from  MusicMoz (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
So far so good! (1) MusicBrainz database Adapter Database    RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB     RDF MusicMoz    RDF XML 2) RDF 1 )  Music style User
So far so good! (2) Ajax Web Framework  GRDDL Processor For each Artist SPARQL Client MusicBrainz SPARQL Endpoint HTTP REST Client EVDB  HTTP REST service GRDDL Processor EVDB     RDF MusicMoz    RDF Linking Artists to events RDF Merge Estrazione e trasformazione Ajax Web Framework  Music style Set of artist in RDF Artist SPARQL Query Events in XML Events in RDF Artists and events in RDF Artist data in RDF HTTP Query Dati RDF Artists and events in RDF
D.1  Model the application ontology D.2  Model the content ontology R.1  Users’ needs analysis R.3  Software requirements analysis R.4 Content requirements analysis D.3  Model sample contents Reuse Merge Extend I.1  Implement the initial Knowledge Base V.1   Validation I.3  Choose content annotation methods I.2  Implement the integrated model Reuse Merge Extend I.4  Implement the application R.2  Risk analysis D.4  Design Application T.1  Testing
What’s left? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What’s left? Ajax Web Framework  GRDDL Processor For each Artist SPARQL Client MusicBrainz SPARQL Endpoint HTTP REST Client EVDB  HTTP REST service GRDDL Processor EVDB     RDF MusicMoz    RDF Linking Artists to events RDF Merge Estrazione e trasformazione Ajax Web Framework  Music style Set of artist in RDF Artist SPARQL Query Events in XML Events in RDF Artists and events in RDF Artist data in RDF HTTP Query Dati RDF Artists and events in RDF
MEMO:  Execution Semantics (1) ,[object Object],[object Object],[object Object]
Step 2 :  from the music style to the artists ,[object Object],[object Object],String sparqlQueryString = &quot;PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>&quot; + &quot;PREFIX meex: <http://swa.cefriel.it/meex#>&quot; + &quot;SELECT DISTINCT ?performer &quot; + &quot;WHERE { ?performer meex:performsStyle ?style.&quot; + &quot;  ?style rdfs:label amp;quot;&quot; + style + &quot;amp;quot;.}&quot;;
MEMO:  Execution Semantics (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Step 3.a: querying MusicBrainz  ,[object Object],String sparqlQueryString =    &quot;PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>”   + &quot;PREFIX mb: <http://musicbrainz.org/>”   + &quot;DESCRIBE <&quot;+ artist + &quot;>&quot;; SPARQLClient sparqlClient = new SPARQLClient(null); try { return sparqlClient.executeDescribeQuery(sparqlQueryString,   Config.MusicBrainzSPARQLEndpoint); } finally { sparqlClient.closeQuery(); } Excerpts from the file MusicBrainz.java
Step 3.b: querying EVDB ,[object Object],invokeHttpEndpoint(performerLabel, eventsFilename); prepareForGRDDL(eventsFilename); Model m = GRDDLProcessor.ApplyGRDDLTransformation(eventsFilename); private static void invokeHttpEndpoint(String keywords, String outputFilename) throws IOException { URL url = new URL(   &quot;http://api.evdb.com/rest/events/atom?sort_order=relevance&&quot;   + &quot;keywords=&quot; + URLEncoder.encode(keywords, &quot;UTF-8&quot;)   + &quot;&category=music&app_key=&quot;+Config.EVDBKey); URLConnection conn = url.openConnection(); conn.setDoOutput(true); BufferedReader in = new BufferedReader(new InputStreamReader(   conn.getInputStream())); […]  while ((inLine = in.readLine()) != null)  writer.write(inLine + &quot;&quot;); } Excerpts from the file EVDB.java
Step 3.c: linking artists to events ,[object Object],[object Object],String sparqlQueryString = &quot;PREFIX meex: <http://swa.cefriel.it/meex#>&quot; + &quot;CONSTRUCT {<&quot; + performer + &quot;> meex:performsEvent ?event.}“ + &quot;WHERE {?event a meex:Event.}&quot;;
MEMO:  Execution Semantics (3) ,[object Object],[object Object],[object Object],[object Object]
Step 4: preparing the data for the GUI  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Step 4: configuring Exhibit  ,[object Object],[object Object],[object Object],[object Object],[object Object]
Step 4: a sample JSON file ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Step 4: serializing RDF in JSON ,[object Object],[object Object],[object Object],[object Object]
Step 4: extracting the data  ,[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],[object Object],[object Object],[object Object]
Step 5 and 6
Step 5 and 6
Tools employed (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Tools employed (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Thank you for paying attention Any Question?
Realizing a Semantic Web Application Emanuele Della Valle Dario Cerizza Irene Celino http://www.cefriel.it    http://swa.cefriel.it    emanuele.dellavalle@cefriel.it http://emanueledellavalle.org 7 th  Int. Semantic Web Conference  ISWC 2008 Karlsruhe, Germany, October 26, 2008 C enter of  E xcellence  F or  R esearch,  I nnovation,  E ducation and industrial  L ab partnership - Politecnico di Milano
Credits and Links ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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Developing A Semantic Web Application - ISWC 2008 tutorial

  • 1. Realizing a Semantic Web Application Emanuele Della Valle Dario Cerizza Irene Celino http://www.cefriel.it http://swa.cefriel.it [email_address] http://emanueledellavalle.org 7 th Int. Semantic Web Conference ISWC 2008 Karlsruhe, Germany, October 26, 2008 C enter of E xcellence F or R esearch, I nnovation, E ducation and industrial L ab partnership - Politecnico di Milano
  • 2.
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  • 17. The rough structure of data integration
  • 18.
  • 19. So where is the Semantic Web?
  • 20.
  • 21. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 22. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 23. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 24.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 33.
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  • 54.
  • 55. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 56. Modeling MusicBrainz schema in OWL @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix mb: <http://musicbrainz.org/> . mb:Artist a owl:Class ; rdfs:label &quot;MusicBrainz Artist and Band&quot; . mb:artist_relation a owl:ObjectProperty ; rdfs:domain mb:Artist ; rdfs:range mb:Artist . MusicBrainz.n3 artist artist_relation id gid artist ref
  • 57.
  • 58. MusicMoz schema category from * resource style 1 * name link name string type
  • 59. Modeling MusicMoz schema in OWL @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix mm: <http://musicmoz.org/> . @prefix mb: <http://musicbrainz.org/> . mm:from a owl:DatatypeProperty ; rdfs:domain mb:Artist ; rdfs:range <http://www.w3.org/2001/XMLSchema#string>. mm:Style a owl:Class ; rdfs:label &quot;MusicMoz Music Style&quot; . mm:hasStyle a owl:ObjectProperty ; rdfs:domain mb:Artist ; rdfs:range mm:Style . MusicMoz.n3
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  • 61.
  • 62.
  • 63. “ Application Connected by Concepts ” artists Music styles events time places Meex ontology MusicBrainz EVDB MusicMoz Meex
  • 64.
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  • 69.
  • 70.
  • 71. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 72.
  • 73. meex interfaces MusicBrainz database Adapter Database  RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB  RDF MusicMoz  RDF XML 2) RDF 1 ) Music style User
  • 74.
  • 75.
  • 76. Designing how meex works inside Ajax Web Framework GRDDL Processor For each Artist SPARQL Client MusicBrainz SPARQL Endpoint HTTP REST Client EVDB HTTP REST service GRDDL Processor EVDB  RDF MusicMoz  RDF Linking Artists to Events RDF Merge Extraction and Transformation Ajax Web Framework Music style Set of artist in RDF Artist SPARQL Query Events in XML Events in RDF Artists and events in RDF Artist data in RDF HTTP Query Dati RDF Artists and events in RDF
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  • 81. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 82.
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  • 85.
  • 86. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
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  • 92. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 93.
  • 94. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 95.
  • 96. meex interfaces (1) MusicBrainz database Adapter Database  RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB  RDF MusicMoz  RDF XML 2) RDF 1 ) Music style User
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  • 102. meex interfaces (2) MusicBrainz database Adapter Database  RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB  RDF MusicMoz  RDF XML 2) RDF 1 ) Music style User
  • 103.
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  • 106.
  • 107. So far so good! (1) MusicBrainz database Adapter Database  RDF SPARQL Server EVDB REST service MusicMoz File XML meex XML Browser Web 3) HTML and RDF 2) RDF GRDDL processor EVDB  RDF MusicMoz  RDF XML 2) RDF 1 ) Music style User
  • 108. So far so good! (2) Ajax Web Framework GRDDL Processor For each Artist SPARQL Client MusicBrainz SPARQL Endpoint HTTP REST Client EVDB HTTP REST service GRDDL Processor EVDB  RDF MusicMoz  RDF Linking Artists to events RDF Merge Estrazione e trasformazione Ajax Web Framework Music style Set of artist in RDF Artist SPARQL Query Events in XML Events in RDF Artists and events in RDF Artist data in RDF HTTP Query Dati RDF Artists and events in RDF
  • 109. D.1 Model the application ontology D.2 Model the content ontology R.1 Users’ needs analysis R.3 Software requirements analysis R.4 Content requirements analysis D.3 Model sample contents Reuse Merge Extend I.1 Implement the initial Knowledge Base V.1 Validation I.3 Choose content annotation methods I.2 Implement the integrated model Reuse Merge Extend I.4 Implement the application R.2 Risk analysis D.4 Design Application T.1 Testing
  • 110.
  • 111. What’s left? Ajax Web Framework GRDDL Processor For each Artist SPARQL Client MusicBrainz SPARQL Endpoint HTTP REST Client EVDB HTTP REST service GRDDL Processor EVDB  RDF MusicMoz  RDF Linking Artists to events RDF Merge Estrazione e trasformazione Ajax Web Framework Music style Set of artist in RDF Artist SPARQL Query Events in XML Events in RDF Artists and events in RDF Artist data in RDF HTTP Query Dati RDF Artists and events in RDF
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  • 128. Thank you for paying attention Any Question?
  • 129. Realizing a Semantic Web Application Emanuele Della Valle Dario Cerizza Irene Celino http://www.cefriel.it http://swa.cefriel.it emanuele.dellavalle@cefriel.it http://emanueledellavalle.org 7 th Int. Semantic Web Conference ISWC 2008 Karlsruhe, Germany, October 26, 2008 C enter of E xcellence F or R esearch, I nnovation, E ducation and industrial L ab partnership - Politecnico di Milano
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  • 131. Advertisement: if you speak Italian …