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pl:dydaktyka:semweb:lab-rdfmodel [2017/11/05 19:56] kkutt [2 FOAF [5 minutes]] |
pl:dydaktyka:semweb:lab-rdfmodel [2019/09/30 21:20] (aktualna) kkutt [Introduction. Modeling knowledge with Resource Description Framework (RDF)] |
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| ====== Introduction. Modeling knowledge with Resource Description Framework (RDF) ====== | ====== Introduction. Modeling knowledge with Resource Description Framework (RDF) ====== | ||
| - | ^ Last verification: | 20171001 | | + | ^ Last verification: | 20190930 | |
| ^ Tools required for this lab: | Pens and paper | | ^ Tools required for this lab: | Pens and paper | | ||
| Linia 27: | Linia 27: | ||
| - Save your FOAF file. Put it in the report 8-). | - Save your FOAF file. Put it in the report 8-). | ||
| - Publish your file so that it can be referenced with URL. Put the URL into the report 8-) | - Publish your file so that it can be referenced with URL. Put the URL into the report 8-) | ||
| - | - Visualize your FOAF file with <wrap caution>[[http://foaf-visualizer.gnu.org.ua/|FOAF.Vix]]</wrap>. Simply put the URL as an ''uri'' argument to the FOAF.Vix, e.g.: http://foaf-visualizer.gnu.org.ua/?nocache=1&uri=http://home.agh.edu.pl/~kkutt/foaf.rdf | + | - Visualize your FOAF file with <wrap caution>[[http://foaf-visualizer.gnu.org.ua/|FOAF.Vix]]</wrap>. Simply put the URL as an ''uri'' argument to the FOAF.Vix, e.g.: http://foaf-visualizer.gnu.org.ua/?nocache=1&uri=http://krzysztof.kutt.pl/foaf.rdf |
| - Add more friends using their FOAF files. Visualize again. | - Add more friends using their FOAF files. Visualize again. | ||
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| - Go to the <wrap caution>[[http://any23.org/|Anything to Triples]]</wrap> webpage and in section "Convert document at URI": | - Go to the <wrap caution>[[http://any23.org/|Anything to Triples]]</wrap> webpage and in section "Convert document at URI": | ||
| * select: **turtle** from drop-down list (default is best) | * select: **turtle** from drop-down list (default is best) | ||
| - | * change URL from ''http://twitter.com/cygri'' to ''http://home.agh.edu.pl/~kkutt/foaf.rdf'' | + | * change URL from ''http://twitter.com/cygri'' to ''http://krzysztof.kutt.pl/foaf.rdf'' |
| * validation: **validate** | * validation: **validate** | ||
| * report: **checked** | * report: **checked** | ||
| Linia 79: | Linia 79: | ||
| * click "Convert" button | * click "Convert" button | ||
| - You will get an XML with a lot of empty tags and Turtle code inside ''<data><![CDATA[ ... ]]></data>'' | - You will get an XML with a lot of empty tags and Turtle code inside ''<data><![CDATA[ ... ]]></data>'' | ||
| - | - Analyze returned model. Especially look at last five statements:<code><http://home.agh.edu.pl/~kkutt/foaf.rdf#me> foaf:knows _:node1a07qklgvx22181 . | + | - Analyze returned model. Especially look at last five statements:<code><http://hkrzysztof.kutt.pl/foaf.rdf#me> foaf:knows _:node1a07qklgvx22181 . |
| _:node1a07qklgvx22181 a foaf:Person ; | _:node1a07qklgvx22181 a foaf:Person ; | ||
| Linia 90: | Linia 90: | ||
| * 8-) Include your converted FOAF file in the report archive. | * 8-) Include your converted FOAF file in the report archive. | ||
| - | ==== - Modeling knowledge with RDF graphs [20 minutes] ==== | + | ==== - Modeling knowledge with RDF graphs [25 minutes] ==== |
| RDF is a data model based on principle of representing relational information as labeled directed graphs. | RDF is a data model based on principle of representing relational information as labeled directed graphs. | ||
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| * [[http://www.w3.org/TR/rdf11-concepts/|RDF Abstract Syntax]] | * [[http://www.w3.org/TR/rdf11-concepts/|RDF Abstract Syntax]] | ||
| * [[http://www.w3.org/2000/10/swap/Primer.html|Primer: Getting into RDF & Semantic Web using N3]] | * [[http://www.w3.org/2000/10/swap/Primer.html|Primer: Getting into RDF & Semantic Web using N3]] | ||
| + | * RDFS enables simple reasoning: [[https://www.w3.org/TR/rdf11-mt/#patterns-of-rdfs-entailment-informative|Patterns of RDFS entailment]] | ||
| Common vocabularies: | Common vocabularies: | ||
