SlideWiki RDF Knowledge Graph

There is a cool page with the content of this document.

This RDF KG is built by means of Morph mappings.

About Morph

Morph (Morph-XR2RML) is an implementation of XR2RML. XR2RML is an extension of RML (supports MongoDB). RML is an extension of R2RML (does not support MongoDB). R2RML is a W3C Recommendation.

Queries

These are a few examples of SPARQL queries that can be run over the SPARQL Endpoint located at http://slidewiki.oeg-upm.net/sparql

Q1. My decks (IRIs of decks created by a given user (forename))

Substitute 'Mariano' for any other literal.

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?d WHERE {
   ?u a swo:User .
   ?u swo:forename ?n . FILTER (regex(?n, 'Mariano')) .
   ?d a swo:Deck .
   ?d swo:hasUser ?u
}

Click here to execute que query and see the result.

Q2. My slides (IRIs of slides created by a given user (forename))

Substitute 'Mariano' for any other literal.

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?s WHERE {
   ?u a swo:User .
   ?u swo:forename ?n . FILTER (regex(?n, 'Mariano')) .
   ?s a swo:Slide .
   ?s swo:hasUser ?u
}

Q3. Top deck creators (ranking of users by number of decks created)

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?n (COUNT(?d) AS ?count) WHERE {
   ?u a swo:User .
   ?u swo:forename ?n .
   ?d a swo:Deck .
   ?d swo:hasUser ?u
} GROUP BY ?n ORDER BY DESC(?count)

Q4. Top slide creators (ranking of users by number of slides created)

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?n (COUNT(?s) AS ?count) WHERE {
   ?u a swo:User .
   ?u swo:forename ?n .
   ?s a swo:Slide .
   ?s swo:hasUser ?u
} GROUP BY ?n ORDER BY DESC(?count)

Q5. slideRevision(s) more used (in more deckRevisions)

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?sr (COUNT(?sr) AS ?count) WHERE {
   ?sr a swo:SlideRevision .
   ?sr swo:inDeckRevision ?dr .
   ?dr a swo:DeckRevision 
} GROUP BY ?sr ORDER BY DESC(?count)

Q6. SlideRevisions with a given content

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?sr WHERE {
   ?sr a swo:SlideRevision .
   ?sr swo:content ?c . FILTER (regex(?c, 'Semantic Web')) .
}

Q7. SlideRevisions created after a given date (timestamp means created)

PREFIX swo: <http://slidewiki.oeg-upm.net/ontology/>
SELECT ?sr WHERE {
   ?sr a swo:SlideRevision .
   ?sr swo:timestamp ?n . FILTER (?n > "2018-07-17T00:00:00Z"^^xsd:dateTime) .
}

Summary of markdown syntax

For more details see GitHub Flavored Markdown.

MarianoRico/SlideWiki_KG