Interface ITripleStore

Interface for Triple Stores.

Inherited Members

Namespace: VDS.RDF

Assembly: dotNetRdf.dll

Syntax

public interface ITripleStore : IDisposable

Remarks

A Triple Store may be a representation of some storage backed actual store or just a temporary collection of Graphs created for working with. Note that an implementation is not required to provide a definitive view of a Triple Store and may only provide a limited/partial snapshot of the underlying store. Check the documentation for the various implementations to see what type of view of a Triple Store they actually provide.

Properties

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Graphs

Gets the Graph Collection of Graphs in this Triple Store.

Declaration

BaseGraphCollection Graphs { get; }

Property Value

Type	Description
BaseGraphCollection

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IsEmpty

Gets whether a TripleStore is Empty.

Declaration

bool IsEmpty { get; }

Property Value

Type	Description
bool

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this[Uri]

Gets a Graph from the Triple Store;.

Declaration

[Obsolete("Replaced by this[IRefNode]")]
IGraph this[Uri graphUri] { get; }

Parameters

Type	Name	Description
Uri	graphUri	Graph URI.

Property Value

Type	Description
IGraph

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this[IRefNode?]

Gets a graph from the triple store.

Declaration

IGraph this[IRefNode? graphName] { get; }

Parameters

Type	Name	Description
IRefNode	graphName	The name of the graph to be retrieved. May be null to retrieve the default (unnamed) graph.

Property Value

Type	Description
IGraph

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Quads

Gets all the Quads in the Triple Store which are currently loaded in memory.

Declaration

IEnumerable<Quad> Quads { get; }

Property Value

Type	Description
IEnumerable<Quad>

Remarks

Since a Triple Store object may represent only a snapshot of the underlying Store evaluating this enumerator may only return some of the Quads in the Store and may depending on specific Triple Store return nothing.

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Triples

Gets all the Triples in the Triple Store which are currently loaded in memory (see remarks).

Declaration

IEnumerable<Triple> Triples { get; }

Property Value

Type	Description
IEnumerable<Triple>

Remarks

Since a Triple Store object may represent only a snapshot of the underlying Store evaluating this enumerator may only return some of the Triples in the Store and may depending on specific Triple Store return nothing.

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UriFactory

Get the preferred URI factory to use when creating URIs in this store.

Declaration

IUriFactory UriFactory { get; }

Property Value

Type	Description
IUriFactory

Methods

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Add(IGraph)

Adds a Graph into the Triple Store.

Declaration

bool Add(IGraph g)

Parameters

Type	Name	Description
IGraph	g	Graph to add.

Returns

Type	Description
bool

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Add(IGraph, bool)

Adds a Graph into the Triple Store.

Declaration

bool Add(IGraph g, bool mergeIfExists)

Parameters

Type	Name	Description
IGraph	g	Graph to add.
bool	mergeIfExists	Controls whether the Graph should be merged with an existing Graph of the same Uri if it already exists in the Triple Store.

Returns

Type	Description
bool

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Add(IRefNode?)

Adds an empty graph with the specified name to the triple store.

Declaration

bool Add(IRefNode? graphName)

Parameters

Type	Name	Description
IRefNode	graphName

Returns

Type	Description
bool	True if a new graph was added, false otherwise.

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AddFromUri(Uri)

Adds a Graph into the Triple Store by dereferencing the Graph Uri to get the RDF and then load the resulting Graph into the Triple Store.

Declaration

bool AddFromUri(Uri graphUri)

Parameters

Type	Name	Description
Uri	graphUri	Uri of the Graph to be added.

Returns

Type	Description
bool

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AddFromUri(Uri, bool)

Adds a Graph into the Triple Store by dereferencing the Graph Uri to get the RDF and then load the resulting Graph into the Triple Store.

Declaration

bool AddFromUri(Uri graphUri, bool mergeIfExists)

Parameters

Type	Name	Description
Uri	graphUri	Uri of the Graph to be added.
bool	mergeIfExists	Controls whether the Graph should be merged with an existing Graph of the same Uri if it already exists in the Triple Store.

Returns

Type	Description
bool

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AddFromUri(Uri, bool, Loader)

Adds a Graph into the Triple Store by dereferencing the Graph Uri to get the RDF and then load the resulting Graph into the Triple Store.

Declaration

bool AddFromUri(Uri graphUri, bool mergeIfExists, Loader loader)

Parameters

Type	Name	Description
Uri	graphUri	Uri of the Graph to be added.
bool	mergeIfExists	Controls whether the Graph should be merged with an existing Graph of the same Uri if it already exists in the Triple Store.
Loader	loader	The loader to use for retrieving and parsing the graph data.

Returns

Type	Description
bool

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Assert(Quad)

Assert a quad in the triple store.

Declaration

void Assert(Quad quad)

Parameters

Type	Name	Description
Quad	quad	The quad to be added.

Remarks

If the quad's graph is not currently in the triple store, a new graph will be added.

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GetQuads(INode?, INode?, INode?, IRefNode?, bool)

Return an enumeration of all quads in the store that match the specified subject, predicate, object and/or graph.

Declaration

IEnumerable<Quad> GetQuads(INode? s = null, INode? p = null, INode? o = null, IRefNode? g = null, bool allGraphs = true)

Parameters

Type	Name	Description
INode	s	The subject node to match. Null matches all subject nodes.
INode	p	The predicate node to match. Null matches all predicate nodes.
INode	o	The object node to match. Null matches all object nodes.
IRefNode	g	The graph to match. Null matches all graphs if `allGraphs` is true, or only the unnamed graph is `allGraphs` is false.
bool	allGraphs

Returns

Type	Description
IEnumerable<Quad>

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HasGraph(Uri)

Checks whether the Graph with the given Uri is in this Triple Store.

Declaration

[Obsolete("Replaced by HasGraph(IRefNode)")]
bool HasGraph(Uri graphUri)

Parameters

Type	Name	Description
Uri	graphUri	Graph Uri.

Returns

Type	Description
bool

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HasGraph(IRefNode?)

Checks whether the graph with the given name is in this triple store.

Declaration

bool HasGraph(IRefNode? graphName)

Parameters

Type	Name	Description
IRefNode	graphName	The name of the graph to check for.

Returns

Type	Description
bool	True if this store contains a graph with the specified name, false otherwise.

Remarks

Pass null forgraphName to check for the default (unnamed) graph.

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Remove(Uri?)

Removes a Graph from the Triple Store.

Declaration

[Obsolete("Replaced by Remove(IRefNode)")]
bool Remove(Uri? graphUri)

Parameters

Type	Name	Description
Uri	graphUri	Graph Uri of the Graph to remove.

Returns

Type	Description
bool

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Remove(IRefNode?)

Removes a graph from the triple store.

Declaration

bool Remove(IRefNode? graphName)

Parameters

Type	Name	Description
IRefNode	graphName	The name of the graph to remove.

Returns

Type	Description
bool	True if the operation removed a graph, false if no matching graph was found to remove.

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Retract(Quad)

Remove a quad from the triple store.

Declaration

void Retract(Quad quad)

Parameters

Type	Name	Description
Quad	quad	The quad to be removed.

Remarks

If the quad's graph is not currently in the triple store, this operation will make no modification to the triple store. Otherwise it will invoke the Retract method on the graph.

Events

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GraphAdded

Event which is raised when a Graph is added

Declaration

event TripleStoreEventHandler? GraphAdded

Event Type

Type	Description
TripleStoreEventHandler

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GraphChanged

Event which is raised when a Graphs contents changes

Declaration

event TripleStoreEventHandler? GraphChanged

Event Type

Type	Description
TripleStoreEventHandler

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GraphCleared

Event which is raised when a Graph is cleared

Declaration

event TripleStoreEventHandler? GraphCleared

Event Type

Type	Description
TripleStoreEventHandler

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GraphMerged

Event which is raised when a Graph has a merge operation performed on it

Declaration

event TripleStoreEventHandler? GraphMerged

Event Type

Type	Description
TripleStoreEventHandler

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GraphRemoved

Event which is raised when a Graph is removed

Declaration

event TripleStoreEventHandler? GraphRemoved

Event Type

Type	Description
TripleStoreEventHandler

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)

TripleStoreExtensions.LoadFromEmbeddedResource(ITripleStore, string)

TripleStoreExtensions.LoadFromEmbeddedResource(ITripleStore, string, IStoreReader)

TripleStoreExtensions.LoadFromFile(ITripleStore, string)

TripleStoreExtensions.LoadFromFile(ITripleStore, string, IStoreReader)

TripleStoreExtensions.LoadFromString(ITripleStore, string)

TripleStoreExtensions.LoadFromString(ITripleStore, string, IStoreReader)

TripleStoreExtensions.LoadFromUri(ITripleStore, Uri)

TripleStoreExtensions.LoadFromUri(ITripleStore, Uri, IStoreReader)

TripleStoreExtensions.LoadFromUri(ITripleStore, Uri, IStoreReader, Loader)

TripleStoreExtensions.SaveToFile(ITripleStore, string)

TripleStoreExtensions.SaveToFile(ITripleStore, string, IStoreWriter)