public void UseSimpleGraphToPerformSelectQuery()
{
var graph = ConstructGraph();
var x = new RDFSharp.Query.RDFVariable("x");
var patternGroup = new RDFSharp.Query.RDFPatternGroup("PG1");
patternGroup.AddPattern(new RDFSharp.Query.RDFPattern(
x,
RDFSharp.Model.RDFVocabulary.FOAF.FAMILY_NAME,
new RDFSharp.Model.RDFPlainLiteral("Doe")));
var query = new RDFSharp.Query.RDFSelectQuery();
query.AddPatternGroup(patternGroup);
var result = query.ApplyToGraph(graph);
Assert.AreEqual(1, result.SelectResultsCount);
foreach (System.Data.DataRow row in result.SelectResults.Rows)
{
foreach (System.Data.DataColumn column in result.SelectResults.Columns)
{
var cellValue = row[column];
Util.WriteLine($"{column.ColumnName}: {cellValue}");
}
}
}
public void DemonstrateInference()
{
var graph = LoadOntologyGraph();
var ontology = RDFOntology.FromRDFGraph(graph);
var report = ontology.Validate();
foreach (var error in report.SelectErrors())
{
Util.WriteLine(error.EvidenceMessage);
}
var reasoner = RDFOntologyReasoner.CreateNew("Default")
.WithRule(RDFBASEReasonerRuleset.DomainEntailment)
.WithRule(RDFBASEReasonerRuleset.RangeEntailment)
.WithRule(RDFBASEReasonerRuleset.SubClassTransitivity)
.WithRule(RDFBASEReasonerRuleset.SubPropertyTransitivity)
.WithRule(RDFBASEReasonerRuleset.TransitivePropertyEntailment)
.WithRule(RDFBASEReasonerRuleset.SymmetricPropertyEntailment)
.WithRule(RDFBASEReasonerRuleset.InverseOfEntailment);
reasoner.ApplyToOntology(ref ontology);
var x = new RDFSharp.Query.RDFVariable("x");
var y = new RDFSharp.Query.RDFVariable("y");
var patterns = new List <RDFSharp.Query.RDFPattern>
{
new RDFSharp.Query.RDFPattern(
x,
new RDFSharp.Model.RDFResource("http://example.com/demo#name"),
new RDFSharp.Model.RDFPlainLiteral("Alice")),
new RDFSharp.Query.RDFPattern(
y,
new RDFSharp.Model.RDFResource("http://example.com/demo#parentOf"),
x),
};
var patternGroup = new RDFSharp.Query.RDFPatternGroup("PG1", patterns);
var query = new RDFSharp.Query.RDFSelectQuery();
query.AddProjectionVariable(y);
query.AddPatternGroup(patternGroup);
var result = query.ApplyToOntology(ontology);
Assert.AreEqual(1, result.SelectResultsCount);
foreach (System.Data.DataRow row in result.SelectResults.Rows)
{
foreach (System.Data.DataColumn column in result.SelectResults.Columns)
{
var cellValue = row[column];
Util.WriteLine($"{column.ColumnName}: {cellValue}");
}
}
}
public void UseSimpleGraphToPerformAskQuery()
{
var graph = ConstructGraph();
var x = new RDFSharp.Query.RDFVariable("x");
var patternGroup = new RDFSharp.Query.RDFPatternGroup("PG1");
patternGroup.AddPattern(new RDFSharp.Query.RDFPattern(
x,
RDFSharp.Model.RDFVocabulary.FOAF.FAMILY_NAME,
new RDFSharp.Model.RDFPlainLiteral("Doe")));
var query = new RDFSharp.Query.RDFAskQuery();
query.AddPatternGroup(patternGroup);
var result = query.ApplyToGraph(graph);
Assert.IsTrue(result.AskResult);
}
public void UseMultipleGraphToPerformSelectQuery()
{
var firstGraph = ConstructGraph();
var secondGraph = LoadGraphFromJsonLd();
var store = new RDFSharp.Store.RDFMemoryStore();
store.MergeGraph(firstGraph);
store.MergeGraph(secondGraph);
var x = new RDFSharp.Query.RDFVariable("x");
var y = new RDFSharp.Query.RDFVariable("y");
var patternGroup = new RDFSharp.Query.RDFPatternGroup("PG1");
patternGroup.AddPattern(new RDFSharp.Query.RDFPattern(
x,
y,
RDFSharp.Model.RDFVocabulary.FOAF.FAMILY_NAME,
new RDFSharp.Model.RDFPlainLiteral("Doe")));
var query = new RDFSharp.Query.RDFSelectQuery();
query.AddProjectionVariable(x);
query.AddProjectionVariable(y);
query.AddPatternGroup(patternGroup);
var result = query.ApplyToStore(store);
Assert.AreEqual(2, result.SelectResultsCount);
foreach (System.Data.DataRow row in result.SelectResults.Rows)
{
foreach (System.Data.DataColumn column in result.SelectResults.Columns)
{
var cellValue = row[column];
Util.WriteLine($"{column.ColumnName}: {cellValue}");
}
}
}
