Class Graph

Class for representing RDF Graphs.
Inheritance
System.Object
BaseGraph
Graph
NonIndexedGraph
OntologyGraph
BaseSparqlView
QueryableGraph
ThreadSafeGraph
UnionGraph
Implements
System.IDisposable
System.Xml.Serialization.IXmlSerializable
System.Runtime.Serialization.ISerializable
Inherited Members
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: VDS.RDF
Assembly: dotNetRDF.dll
Syntax
[Serializable]
public class Graph : BaseGraph, IGraph, INodeFactory, IDisposable, IXmlSerializable, ISerializable

Constructors

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Graph()

Creates a new instance of a Graph.
Declaration
public Graph()
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Graph(Boolean)

Creates a new instance of a Graph with an optionally empty Namespace Map.
Declaration
public Graph(bool emptyNamespaceMap)
Parameters
Type Name Description
System.Boolean emptyNamespaceMap Whether the Namespace Map should be empty.
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Graph(SerializationInfo, StreamingContext)

Deserialization Constructor.
Declaration
protected Graph(SerializationInfo info, StreamingContext context)
Parameters
Type Name Description
System.Runtime.Serialization.SerializationInfo info Serialization Information.
System.Runtime.Serialization.StreamingContext context Streaming Context.
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Graph(BaseTripleCollection)

Creates a new instance of a Graph using the given Triple Collection.
Declaration
public Graph(BaseTripleCollection tripleCollection)
Parameters
Type Name Description
BaseTripleCollection tripleCollection Triple Collection.
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Graph(BaseTripleCollection, Boolean)

Creates a new instance of a Graph using the given Triple Collection and an optionally empty Namespace Map.
Declaration
public Graph(BaseTripleCollection tripleCollection, bool emptyNamespaceMap)
Parameters
Type Name Description
BaseTripleCollection tripleCollection Triple Collection.
System.Boolean emptyNamespaceMap Whether the Namespace Map should be empty.

Methods

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Assert(IEnumerable<Triple>)

Asserts a List of Triples in the graph.
Declaration
public override bool Assert(IEnumerable<Triple> ts)
Parameters
Type Name Description
System.Collections.Generic.IEnumerable<Triple> ts List of Triples in the form of an IEnumerable.
Returns
Type Description
System.Boolean
Overrides
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Assert(Triple)

Asserts a Triple in the Graph.
Declaration
public override bool Assert(Triple t)
Parameters
Type Name Description
Triple t The Triple to add to the Graph.
Returns
Type Description
System.Boolean
Overrides
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GetBlankNode(String)

Returns the Blank Node with the given Identifier.
Declaration
public override IBlankNode GetBlankNode(string nodeId)
Parameters
Type Name Description
System.String nodeId The Identifier of the Blank Node to select.
Returns
Type Description
IBlankNode Either the Blank Node or null if no Node with the given Identifier exists.
Overrides
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GetLiteralNode(String)

Returns the LiteralNode with the given Value if it exists.
Declaration
public override ILiteralNode GetLiteralNode(string literal)
Parameters
Type Name Description
System.String literal The literal value of the Node to select.
Returns
Type Description
ILiteralNode Either the LiteralNode Or null if no Node with the given Value exists.
Overrides
Remarks
The LiteralNode in the Graph must have no Language or DataType set.
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GetLiteralNode(String, String)

Returns the LiteralNode with the given Value in the given Language if it exists.
Declaration
public override ILiteralNode GetLiteralNode(string literal, string langspec)
Parameters
Type Name Description
System.String literal The literal value of the Node to select.
System.String langspec The Language Specifier for the Node to select.
Returns
Type Description
ILiteralNode Either the LiteralNode Or null if no Node with the given Value and Language Specifier exists.
Overrides
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GetLiteralNode(String, Uri)

Returns the LiteralNode with the given Value and given Data Type if it exists.
Declaration
public override ILiteralNode GetLiteralNode(string literal, Uri datatype)
Parameters
Type Name Description
System.String literal The literal value of the Node to select.
System.Uri datatype The Uri for the Data Type of the Literal to select.
Returns
Type Description
ILiteralNode Either the LiteralNode Or null if no Node with the given Value and Data Type exists.
Overrides
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GetTriples(Uri)

Gets all the Triples involving the given Uri.
Declaration
public override IEnumerable<Triple> GetTriples(Uri uri)
Parameters
Type Name Description
System.Uri uri The Uri to find Triples involving.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple> Zero/More Triples.
Overrides
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GetTriples(INode)

Gets all the Triples involving the given Node.
Declaration
public override IEnumerable<Triple> GetTriples(INode n)
Parameters
Type Name Description
INode n The Node to find Triples involving.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple> Zero/More Triples.
Overrides
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GetTriplesWithObject(Uri)

Gets all the Triples with the given Uri as the Object.
Declaration
public override IEnumerable<Triple> GetTriplesWithObject(Uri u)
Parameters
Type Name Description
System.Uri u The Uri to find Triples with it as the Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple> Zero/More Triples.
Overrides
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GetTriplesWithObject(INode)

Gets all the Triples with the given Node as the Object.
Declaration
public override IEnumerable<Triple> GetTriplesWithObject(INode n)
Parameters
Type Name Description
INode n The Node to find Triples with it as the Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
Overrides
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GetTriplesWithPredicate(Uri)

Gets all the Triples with the given Uri as the Predicate.
Declaration
public override IEnumerable<Triple> GetTriplesWithPredicate(Uri u)
Parameters
Type Name Description
System.Uri u The Uri to find Triples with it as the Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple> Zero/More Triples.
Overrides
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GetTriplesWithPredicate(INode)

Gets all the Triples with the given Node as the Predicate.
Declaration
public override IEnumerable<Triple> GetTriplesWithPredicate(INode n)
Parameters
Type Name Description
INode n The Node to find Triples with it as the Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
Overrides
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GetTriplesWithPredicateObject(INode, INode)

Selects all Triples with the given Predicate and Object.
Declaration
public override IEnumerable<Triple> GetTriplesWithPredicateObject(INode pred, INode obj)
Parameters
Type Name Description
INode pred Predicate.
INode obj Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
Overrides
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GetTriplesWithSubject(Uri)

Gets all the Triples with the given Uri as the Subject.
Declaration
public override IEnumerable<Triple> GetTriplesWithSubject(Uri u)
Parameters
Type Name Description
System.Uri u The Uri to find Triples with it as the Subject.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple> Zero/More Triples.
Overrides
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GetTriplesWithSubject(INode)

Gets all the Triples with the given Node as the Subject.
Declaration
public override IEnumerable<Triple> GetTriplesWithSubject(INode n)
Parameters
Type Name Description
INode n The Node to find Triples with it as the Subject.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple> Zero/More Triples.
Overrides
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GetTriplesWithSubjectObject(INode, INode)

Selects all Triples with the given Subject and Object.
Declaration
public override IEnumerable<Triple> GetTriplesWithSubjectObject(INode subj, INode obj)
Parameters
Type Name Description
INode subj Subject.
INode obj Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
Overrides
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GetTriplesWithSubjectPredicate(INode, INode)

Selects all Triples with the given Subject and Predicate.
Declaration
public override IEnumerable<Triple> GetTriplesWithSubjectPredicate(INode subj, INode pred)
Parameters
Type Name Description
INode subj Subject.
INode pred Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
Overrides
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GetUriNode(String)

Returns the UriNode with the given QName if it exists.
Declaration
public override IUriNode GetUriNode(string qname)
Parameters
Type Name Description
System.String qname The QName of the Node to select.
Returns
Type Description
IUriNode
Overrides
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GetUriNode(Uri)

Returns the UriNode with the given Uri if it exists.
Declaration
public override IUriNode GetUriNode(Uri uri)
Parameters
Type Name Description
System.Uri uri The Uri of the Node to select.
Returns
Type Description
IUriNode Either the UriNode Or null if no Node with the given Uri exists.
Overrides
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Retract(IEnumerable<Triple>)

Retracts a enumeration of Triples from the graph.
Declaration
public override bool Retract(IEnumerable<Triple> ts)
Parameters
Type Name Description
System.Collections.Generic.IEnumerable<Triple> ts Enumeration of Triples to retract.
Returns
Type Description
System.Boolean
Overrides
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Retract(Triple)

Retracts a Triple from the Graph.
Declaration
public override bool Retract(Triple t)
Parameters
Type Name Description
Triple t Triple to Retract.
Returns
Type Description
System.Boolean
Overrides
Remarks
Current implementation may have some defunct Nodes left in the Graph as only the Triple is retracted.

Implements

System.IDisposable
System.Xml.Serialization.IXmlSerializable
System.Runtime.Serialization.ISerializable

Extension Methods