Class AskBgp

Represents a BGP which is a set of Triple Patterns.

Inheritance

System.Object

AskBgp

Implements

IBgp

ITerminalOperator

ISparqlAlgebra

IVisitable

IProcessable

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Namespace: VDS.RDF.Query.Algebra

Assembly: dotNetRdf.dll

Syntax

public class AskBgp : IBgp, ITerminalOperator, ISparqlAlgebra, IVisitable, IProcessable

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

Constructors

AskBgp(IEnumerable<ITriplePattern>)

Creates a Streamed BGP containing a set of Triple Patterns.

Declaration

public AskBgp(IEnumerable<ITriplePattern> ps)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T><ITriplePattern>	ps	Triple Patterns.

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

AskBgp(ITriplePattern)

Creates a Streamed BGP containing a single Triple Pattern.

Declaration

public AskBgp(ITriplePattern p)

Parameters

Type	Name	Description
ITriplePattern	p	Triple Pattern.

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

Properties

FixedVariables

Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.

Declaration

public IEnumerable<string> FixedVariables { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<T><string>

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

FloatingVariables

Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.

Declaration

public IEnumerable<string> FloatingVariables { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<T><string>

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

IsEmpty

Gets whether the BGP is the empty BGP.

Declaration

public bool IsEmpty { get; }

Property Value

Type	Description
System.Boolean

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

PatternCount

Gets the number of Triple Patterns in the BGP.

Declaration

public int PatternCount { get; }

Property Value

Type	Description
int

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

TriplePatterns

Gets the Triple Patterns in the BGP.

Declaration

public IReadOnlyList<ITriplePattern> TriplePatterns { get; }

Property Value

Type	Description
System.Collections.Generic.IReadOnlyList<T><ITriplePattern>

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

Variables

Gets the Variables used in the Algebra.

Declaration

public IEnumerable<string> Variables { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<T><string>

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

Methods

Accept<T>(ISparqlAlgebraVisitor<T>)

Declaration

public T Accept<T>(ISparqlAlgebraVisitor<T> visitor)

Parameters

Type	Name	Description
ISparqlAlgebraVisitor<T>	visitor

Returns

Type	Description
T

Type Parameters

Name	Description
T

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext>, TContext)

Declaration

public TResult Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext> processor, TContext context)

Parameters

Type	Name	Description
ISparqlQueryAlgebraProcessor<TResult, TContext>	processor
TContext	context

Returns

Type	Description
TResult

Type Parameters

Name	Description
TResult
TContext

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

ToGraphPattern()

Converts the BGP back to a Graph Pattern.

Declaration

public GraphPattern ToGraphPattern()

Returns

Type	Description
GraphPattern

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

ToQuery()

Converts the Algebra back to a SPARQL Query.

Declaration

public SparqlQuery ToQuery()

Returns

Type	Description
SparqlQuery

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

ToString()

Gets the String representation of the Algebra.

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

object.ToString()

Remarks

An Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.

An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.

Implements

IBgp

ITerminalOperator

ISparqlAlgebra

IVisitable

IProcessable

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)