Assignment3

Assignment2/esteve2604-EstebanAspe.ttl

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+@prefix : <http://example.org/#> .
+@prefix prop: <http://example.org/properties/#> .
+
+
+:Class01 prop:includes :Sensor029;
+         prop:includes :Computer101;
+.
+:Sensor029 prop:hasMeasurement :Measurement8401 .
+:Measurement8401 prop:hasTemperature 29 ;
+                 prop:atTime "2010-06-12T12:00:12" ;
+.
+:Computer101 prop:hasOwner :User10A .
+:User10A prop:hasName "Pedro" .

Assignment2/esteve2604-fromJSONtoJSON-LD.jsonld

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+{
+  "@context": {
+    "prop": "http://example.org/properties/#",
+    "subjects": "http://example.org/subjects/#",
+    "person": "http://example.org/person/#"
+  },
+    "@graph": [
+      {
+        "@id": "person:Esteban_Aspe_Ruiz",
+		"prop:fullName": "Esteban Aspe Ruiz",
+		"prop:hometown": "Móstoles",
+		"prop:age": 22,
+		"prop:almaMater": "Universidad Politécnica de Madrid",
+		"prop:parentsName": ["Fernando Aspe Fernandez", "Gema Ruiz Pino"],
+		"subjects": [
+			{
+				"@id": "subjects:Open_Data_and_Knowledge graphs",
+				"prop:name": "Open Data and Knowledge graphs",
+				"prop:teachers": ["Oscar Corcho", "Daniel Garijo"],
+				"prop:description": "Subject held in first semester of the master in data science"
+			},
+			{
+				"@id": "subjects:Machine_Learning",
+				"prop:name": "Machine Learning",
+				"prop:teachers": ["Concha Bielza"],
+				"prop:description": "Learning different AI algorithms"
+			}
+		]
+      }
+    ]
+}

Assignment2/esteve2604-fromRDFtoJSON-LD.jsonld

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+{
+  "@context": {
+    "prop": "http://example.org/properties/#",
+    "xsd": "http://www.w3.org/2001/XMLSchema#"
+  },
+  "@graph": [
+    {
+      "@id": "http://example.org/#Class01",
+      "prop:includes": [
+        {
+          "@id": "http://example.org/#Sensor029"
+        },
+        {
+          "@id": "http://example.org/#Computer101"
+        }
+      ]
+    },
+    {
+      "@id": "http://example.org/#Sensor029",
+      "prop:hasMeasurement": {
+        "@id": "http://example.org/#Measurement8401"
+      }
+    },
+    {
+      "@id": "http://example.org/#Computer101",
+      "prop:hasOwner": {
+        "@id": "http://example.org/#User10A"
+      }
+    },
+    {
+      "@id": "http://example.org/#Measurement8401",
+      "prop:hasTemperature": {
+        "@type": "xsd:integer",
+        "@value": "29"
+      },
+      "prop:atTime": "2010-06-12T12:00:12"
+    },
+    {
+      "@id": "http://example.org/#User10A",
+      "prop:hasName": "Pedro"
+    }
+  ]
+}

Assignment3/esteve2604-c200249/Esteban_Aspe-Advanced set of SPARQL queries.txt

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+In all queries LIMIT as been introduced to reduce the answers of the query. If you want all results, please delete the LIMIT.
+
+1. Get all the properties that can be applied to instances of the Politician class (<http://dbpedia.org/ontology/Politician>)
+
+select ?property
+where {
+ ?x a <http://dbpedia.org/ontology/Politician> .
+ ?x ?property []
+} LIMIT 1000
+
+2. Get all the properties, except rdf:type, that can be applied to instances of the Politician class
+select distinct ?property
+where {
+ ?x a <http://dbpedia.org/ontology/Politician> .
+ ?x ?property [].
+ FILTER (?property != rdf:type)
+} LIMIT 1000
+
+3. Which different values exist for the properties, except for rdf:type, applicable to the instances of Politician?
+select distinct ?property ?value
+where {
+ ?x a <http://dbpedia.org/ontology/Politician> .
+ ?x ?property ?value.
+ FILTER (?property != rdf:type)
+} LIMIT 1000
+
+4. For each of these applicable properties, except for rdf:type, which different values do they take globally for all those instances?
+select distinct ?property ?valuesForAll
+where {
+ ?x a <http://dbpedia.org/ontology/Politician> .
+ ?x ?property ?valuesForPoliticians.
+ ?y ?property ?valuesForAll.
+ FILTER (?property != rdf:type)
+} LIMIT 1000
+
+5. For each of these applicable properties, except for rdf:type, how many distinct values do they take globally for all those instances?
+select distinct ?valuesForAll
+where {
+ ?x a <http://dbpedia.org/ontology/Politician> .
+ ?x ?property ?valuesForPoliticians.
+ ?y ?property ?valuesForAll.
+ FILTER (?property != rdf:type)
+} LIMIT 1000
+NOTE: To obtain the Distinct values for each property, I considered using group by to group each property with their different values, but
+DBpedia informed that query would take too long.